Weekend engineering works

[Sad Sprinter]

Is it me, or has the frequency of line closures at the weekend increased over the past few years? It seems every weekend there’s sweeping blockades across the system. Here in South London it’s more of a pleasant surprise when my local lines are running normally on a weekend. It is very disheartening and honestly, is another incentive to learn how to drive. I know some people will defend them, but as a passenger, they’re past infuriating, they’re just depressing. My questions are:

Why is so much constant work necessary?

Is there any way to make the work more efficient to avoid frequent closures?

How does our weekend engineering work compare to other countries?

To what extent does frequent weekend line closures impact overall economic performance?

 

[Benjwri]

It is at least in part, over a more general trend, because a lot of engineering work and renewal has been put off under the economic climate but now has reached the point it has to be done.

In terms of locally to you it sounds like there is a specific project, but without knowing an area no one is going to be able to say. If you search on the Network Rail website around your area you may be able to find details of a project near you causing it. At the end of the day though the engineering has to be done, and if you are being affected by something such as one of the resignalling projects it is because the infrastructure has reached the end of it's life. If the engineering isn't done you will just get more disruption at all times from things like signal failures, and which you can't plan for.

== Doublepost prevention - post automatically merged: 1 May 2026 ==

As a followup, the big current project in the South of London is the Victoria and South London Resignalling, if you live in the area in the map under 'Herne Hill, Brixton, Nunhead, and the Battersea area' that is likely to be the cause here. It is unfortunately one of those things that has to be done, and is difficult to split up into bits. Once it is done it should result in less disruptions form the signalling failing, and I would hope as in previous projects they are making use of the closure time to carry out other renewals, which will mean once it is done there is less disruption and also even less engineering works than before for a bit.

Herne Hill, Brixton, Nunhead, and the Battersea area​

Upgrades between Herne Hill, Brixton, Nunhead, and the Battersea area are underway and will continue until 2027.

Overview​

The phase of work involves:

• Replacement of all signalling equipment
• Relocation of signalling control for the Herne Hill & Nunhead areas to the state-of-the-art Three Bridges Rail Operating Centre (TBROC)
• Replacing track and equipment at key rail junctions in South London

Benefits​

• New, modern equipment is being installed which means that railway performance improves and a better service in the area for passengers.
• Relocating the signallers for the area to the state-of-the-art Three Bridges Rail Operating Centre will help them work as a team get trains back on time when an incident occurs.
• The new equipment installed will be easier to maintain, fix and find faults when something does go wrong.
• It improves services into key London stations such as London Victoria, London Blackfriars and London Waterloo

The area that probably has the biggest contrast with engineering at the moment is probably around Catford as the Lewisham resignalling also closes the line via Catford Bridge, although this one has been resulting in closures a bit less often and they are fairly good about not closing both lines at the same time. There is probably an argument that these projects shouldn't have been undertaken simultaneously

Project timeline​

The new signalling system will be installed alongside the existing system over the next two years and will be brought into use over Christmas 2026.

What work is taking place?​

The project involves:

• Replacement of all signalling equipment on the south east London lines running through Lewisham, from New Cross to Blackheath and Hither Green
• Installing Automatic Route Setting (ARS) at Three Bridges Rail Operating Centre to improve route management efficiency in this area.
• Improved signalling layout and modified signal positions.

Project benefits​

• The new, modern equipment will mean fewer faults and fewer delays for passengers in south east London and out to Kent
• The new equipment installed will be easier to maintain, fix and find faults when something does go wrong.
• Modified signalling layout will improve line speeds.
• Upgraded Automatic Route Setting will make route setting and train control more efficient.

 

[hwl]

Is it me, or has the frequency of line closures at the weekend increased over the past few years? It seems every weekend there’s sweeping blockades across the system. Here in South London it’s more of a pleasant surprise when my local lines are running normally on a weekend. It is very disheartening and honestly, is another incentive to learn how to drive. I know some people will defend them, but as a passenger, they’re past infuriating, they’re just depressing. My questions are:

Why is so much constant work necessary?

Is there any way to make the work more efficient to avoid frequent closures?

How does our weekend engineering work compare to other countries?

To what extent does frequent weekend line closures impact overall economic performance?

Presumably you are talking about Southeastern or GTR routes?
Lots of the south London closures in recent years have been due to the the Victoria area resignalling and linked projects which will continue for about another 2 years. This is a once in 4+ decade type activity which involves resignalling or recontrol of previous early 1980s creation of Victoria Area Signalling centre (physically in Clapham Junction) with all control moving to Three Bridges ROC. (With lots of previous removal of the last bits of London Bridge signal box coverage and transfer to TB ROC).
If you look at the plates on signals the VS or VC ids become TVS or TVC when transferred to Three Bridges.
Some bits are just recontrol e.g. West London Line (comparatively late previous resignalling for Eurostar depot moves from Waterloo - North Pole when the Channel Tunnel opened) but most is complete resignalling.

NR has some but not too much background here:

London Victoria and South London resignalling programme - Network Rail

We are delivering a major package of upgrades to modernise 1980s track and signalling on the South London lines into London Victoria.

www.networkrail.co.uk

There has also been significant renewal of some heavily used junction infrastructure that was becoming unreliable e.g. Lewisham and Dartford.

 

[The Planner]

Is it me, or has the frequency of line closures at the weekend increased over the past few years? It seems every weekend there’s sweeping blockades across the system. Here in South London it’s more of a pleasant surprise when my local lines are running normally on a weekend. It is very disheartening and honestly, is another incentive to learn how to drive. I know some people will defend them, but as a passenger, they’re past infuriating, they’re just depressing. My questions are:

Why is so much constant work necessary?

Is there any way to make the work more efficient to avoid frequent closures?

How does our weekend engineering work compare to other countries?

To what extent does frequent weekend line closures impact overall economic performance?

If it doesnt get done, infrastructure fails at a greater rate. Surely planned disruption is better than it collapsing on the day? Work happens in blockades a lot more now as it more efficient, but not everything can be done at the same time as work is often incompatible.

 

[ainsworth74]

It is at least in part, over a more general trend, because a lot of engineering work and renewal has been put off under the economic climate but now has reached the point it has to be done.

Is there also an element that now that red zone working is effectively (or actually?) banned stuff that could have been done between trains whilst the line was open to traffic now has to be done during a line block?

 

[The Planner]

Is there also an element that now that red zone working is effectively (or actually?) banned stuff that could have been done between trains whilst the line was open to traffic now has to be done during a line block?

Yes. A lot of "discussions" have taken place where extra disruptive access is required with operators not always being receptive.

 

[MikeWM]

Is it me, or has the frequency of line closures at the weekend increased over the past few years? It seems every weekend there’s sweeping blockades across the system. Here in South London it’s more of a pleasant surprise when my local lines are running normally on a weekend.

It feels the same up here in Ely, and after going on for so long it has really started to irritate me and put me off trying to travel at all, to the point that my weekend habits have changed sufficiently that I don't expect to go back to travelling the way I did pre-2020 at weekends. Ever.

Over the past three+ years it feels like there has barely been a weekend when a normal service has been running, particularly as far as London. On top of that we've had full closures of Cambridge for the last three Christmas/New Years, closures every Easter, closures most bank holidays.

And now we're currently in week 2 of 4 consecutive full weekend closures of Ely (heaven forbid I might want to go on a day trip over the bank holiday weekend, or that people might want to visit here for the Eel festival weekend which is the biggest annual event held in Ely...)

All of which is on the back of the strikes and before that covid. It's been over six years now since we've had a reliable weekend service to London - ie. one that runs most weekends, or even the majority of weekends.

I know this is due to a number of projects happening more-or-less simultaneously:

- Cambridge South construction
- Cambridge resignalling
- ERTMS rollout on the south ECML
- and now track renewal at Ely

and maybe once all these are done things will get better, but maybe not as we still have

- Relocation of Waterbeach
- Fixing Ely North Junction
- East-West rail

although admittedly the chances of anything happening with the latter two any time soon are fairly remote!

 

[DH1Commuter]

Yes. After a full month of RRBs on the ECML in March tomorrow the RRBs are back north of York.

 

[Sad Sprinter]

Thanks, I’m talking more the Southern routes than the Chatham. I would have thought the Victoria signalling on the Brighton would have been upgraded by now, so perhaps it’s something else. I understand these works need doing, we don’t want to end up like Amtrak’s Northeast Corrdor which is still flogging 100 year old assets, but something needs to be done differently. I’m not the only one who has developed a mentality that the railway “isn’t for the weekends”.

 

[The Planner]

but something needs to be done differently. I’m not the only one who has developed a mentality that the railway “isn’t for the weekends”.

What though? operators and GBR will still take the view that weekends are less of a revenue hit, and midweek blocks have the added complication of freight.

 

[simple simon]

I'm going to Brighton tomorrow (Sunday 3rd May 2026) and when I checked train times I was horrified to see that the usual frequent service from Victoria or London Bridge (Thameslink) is almost totally cancelled. I do not know what is being done, but there will be just one train an hour, from Victoria. I was going to go from either London Bridge or even Farringdon, both of which are very easy to reach from Stratford.

Tomorrow is the day of the Historic Commercial vehicles London - Brighton run and because so many visitors are expected the Volks Railway is running a four train service - for the first time in over 40 years. So for the mainline to cancel almost all trains and also double the journey duration sounds like sheer madness (the trains are travelling via Hove ... 'if only' Uckfield - Lewes was still open).

The only good thing is that the weather forecast will not be ideal for day-trippers wanting to have a day on a seaside beach .. and this will reduce the total number of passengers.

 

[JonathanH]

So for the mainline to cancel almost all trains and also double the journey duration sounds like sheer madness (the trains are travelling via Hove ... 'if only' Uckfield - Lewes was still open).

The Brighton Line is an intensively used railway and there is never really a good time to do work to keep it maintained. They tend to avoid the summer, but that does mean work needs to be done in the autumn, winter and spring. The Brighton link is maintained tomorrow via Littlehampton (or by bus to Three Bridges).

Some passengers will be put off by the arrangements, others will use the services provided. The reality is that demand will still be less than at other times of the year, so it isn't actually 'sheer madness'.

 

[Belperpete]

Is there also an element that now that red zone working is effectively (or actually?) banned stuff that could have been done between trains whilst the line was open to traffic now has to be done during a line block?

Certainly. Particularly with resignalling, it used to be the case that a lot of preparation work would be done while the line was open to traffic. A block would be needed to run in cables and install equipment, but after that things like terminating cables and much testing would be done on site with the line open to traffic, with a final block to commission. I can remember terminating cables on the viaducts approaching London Bridge with trains passing literally inches behind my back.

Nowadays there is also resistance to giving long blockades. I seem to recall that Westbury station was totally closed for about a month when it was remodelled, and Crewe too was shut for a significant period. By the time you allow for handover and hand back times, getting staff and equipment on and off site, contingencies in case of overrun, etc you may achieve surprisingly little in a short block. You will be lucky to get half the work done in four 12 hour blocks that you would in one 48 hour block, for example.

And if the work needs to be carried out in sequence, if you fail to achieve what was programmed in one block, you may not be able to even start the work programmed for the second and subsequent blocks. And you may not be able to complete the work that should have been done in the first block, if the second block doesn't cover the same area. There is a lot less flexibility in rearranging work these days than there was in BR days, consequently there tends to be a lot more contingency built in. Both less work programmed into each block, and extra blocks programmed as contingencies.

 

[swt_passenger]

Nowadays there is also resistance to giving long blockades. I seem to recall that Westbury station was totally closed for about a month when it was remodelled, and Crewe too was shut for a significant period. By the time you allow for handover and hand back times, getting staff and equipment on and off site, contingencies in case of overrun, etc you may achieve surprisingly little in a short block. You will be lucky to get half the work done in four 12 hour blocks that you would in one 48 hour block, for example.

Really? I thought there’d been an increase in closures of up to a few weeks over the last few years.

 

[Snow1964]

This weekend (3 days) and last weekend (2 days) lines are closed Bath - Chippenham and Bath - Westbury.

Now whilst there is an argument for weekends, it rather falls flat when last few years have been midweek blocks Bath-Bristol late autumn.

I can't fathom logic of midweek blocks west of Bath, but weekend block east of Bath. Hopefully someone can explain reason, because beyond my understanding

Rather daftly why they waited until May is a mystery, because May-September is when big cruise changeover weekends at Southampton, where get 13,000+ (over 15,000 some dates) people leaving and similar number joining cruise ships.

Of course Bath-Westbury is main route to Southampton from Bristol, Gloucestershire, South Wales, north Somerset etc. So have picked one of busiest weekends to have replacement buses

 

[Benjwri]

This weekend (3 days) and last weekend (2 days) lines are closed Bath - Chippenham and Bath - Westbury.

Now whilst there is an argument for weekends, it rather falls flat when last few years have been midweek blocks Bath-Bristol late autumn.

I can't fathom logic of midweek blocks west of Bath, but weekend block east of Bath. Hopefully someone can explain reason, because beyond my understanding

Rather daftly why they waited until May is a mystery, because May-September is when big cruise changeover weekends at Southampton, where get 13,000+ (over 15,000 some dates) people leaving and similar number joining cruise ships.

Of course Bath-Westbury is main route to Southampton from Bristol, Gloucestershire, South Wales, north Somerset etc. So have picked one of busiest weekends to have replacement buses

Yes I've thought this was a bit baffling too, they feel the wrong way round given the commuter flow is to/from Bristol, while leisure is largely from London.

Absolutely mess this weekend regardless. It's safe to say the staff are not used to terminating in both platforms, they changed our platform 4 times on Saturday, after having already cancelled the first train! While apologetic they didn't do anything to explain it, and the foul language and abuse a member of train staff directed at a passenger has resulted in a complaint to GWR.

 

[The Planner]

This weekend (3 days) and last weekend (2 days) lines are closed Bath - Chippenham and Bath - Westbury.

Now whilst there is an argument for weekends, it rather falls flat when last few years have been midweek blocks Bath-Bristol late autumn.

I can't fathom logic of midweek blocks west of Bath, but weekend block east of Bath. Hopefully someone can explain reason, because beyond my understanding

Rather daftly why they waited until May is a mystery, because May-September is when big cruise changeover weekends at Southampton, where get 13,000+ (over 15,000 some dates) people leaving and similar number joining cruise ships.

Of course Bath-Westbury is main route to Southampton from Bristol, Gloucestershire, South Wales, north Somerset etc. So have picked one of busiest weekends to have replacement buses

Depends on what was being done, the resource and so on. Not everything needs a blockade. Also it depends on what GWR accept.

 

[RichardAsh1981]

The Brighton Line is an intensively used railway and there is never really a good time to do work to keep it maintained. They tend to avoid the summer, but that does mean work needs to be done in the autumn, winter and spring.

At a big picture this seems fine, but decision makers seem incapable of then realising that certain dates may buck these big picture trends. We have had the same phenomenon of closures into Liverpool hitting a one-off event, a weekend either side would have been quiet.

 

[The Planner]

At a big picture this seems fine, but decision makers seem incapable of then realising that certain dates may buck these big picture trends. We have had the same phenomenon of closures into Liverpool hitting a one-off event, a weekend either side would have been quiet.

That depends significantly on if the event was known about prior to the engineering access being agreed.

 

[High Dyke]

Is there also an element that now that red zone working is effectively (or actually?) banned stuff that could have been done between trains whilst the line was open to traffic now has to be done during a line block?

To some extent, yes. And now even more additional methods for protecting maintenance staff are being introduced in Absolute Block areas. Don't get me wrong, any rail worker death is regrettable, any rail worker death is avoidable. However, the processess being applied are now reducing the amount of track access time available.

If you couple that with the amount of competent maintenance staff that were allowed to leave Network Rail, then it just prolongs the amount of time that work takes place.

 

[Supercoss]

In multi line areas especially, the restrictive “ ALO” regulations ( used to be : Adjacent Line Open - now Any Line Open ) places huge planning restrictions on what lines can be kept open if cranes, plant and other yellow plant in use, even if the adjacent line is not physically occupied the potential for crane jibs, digger buckets , conveyor belts has to be adequately controlled.
the other area to consider is where applicable what electric traction isolation is associated with the works , some large areas switched off ( isolated and earthed) which prev ents electric trains operating.

 

[simple simon]

The Brighton Line is an intensively used railway and there is never really a good time to do work to keep it maintained. They tend to avoid the summer, but that does mean work needs to be done in the autumn, winter and spring. The Brighton link is maintained tomorrow via Littlehampton (or by bus to Three Bridges).

Some passengers will be put off by the arrangements, others will use the services provided. The reality is that demand will still be less than at other times of the year, so it isn't actually 'sheer madness'.

Sending trains via Littlehampton adds an hour on to a journey that in Brighton Belle days took just one hour.. At least Southern ran 12 carriage Class 377 trains! Nevertheless some passengers were standing (or sitting on the floor). My journey to Brighton also took an additional hour because of a power supply issue that halted several trains - not just the one I was on.

Today there were several 'one day only' special events in Brighton and seated next to me this morning was a lady from Eire who had specially flown in to attend an 'open house' event. So all in all she lost an irreplaceable three hours today.

 

[Horizon22]

At the end of the day (or should I say week), there are 168 hours in a week. And generally the longer the block, the more efficient the work achieved. People say it is "sheer madness" and things "need to be done differently", but the work needs to be done and there's never a "good" time to do it and putting it off endlessly can either have serious consequences or lead to more low-level disruption.

 

[Belperpete]

Today there were several 'one day only' special events in Brighton

Probably because it is a bank holiday weekend? However, being a bank holiday weekend means that a longer line block will likely be available, meaning that more work can be done. This probably saves an additional weekend's disruption, meaning overall less disruption.

== Doublepost prevention - post automatically merged: 4 May 2026 ==

At a big picture this seems fine, but decision makers seem incapable of then realising that certain dates may buck these big picture trends. We have had the same phenomenon of closures into Liverpool hitting a one-off event, a weekend either side would have been quiet.

Moving a block by a weekend may not be as simple as you seem to think. If you bring it forward, that needs all the previous works to be completed a week earlier. If one of those earlier works was programmed for a long bank holiday weekend, you can't just move the bank holiday a week earlier. Likewise if you move the work back a week, it will move all the subsequent works back a week....

There are also resource issues. There aren't unlimited numbers of signalling testers, OHLE installers, relaying trains, etc. Such resources are shared between projects. So it may not be possible to move work back by a week, if the resources you need are being used by another project then. Such critical resources are often allocated a year or more in advance.

There are usually more major works wanting the big Christmas and Easter slots than resources available nationally to support them, so some have to get pushed to the other lesser bank holiday weekends. This usually means that more prepatory work has to be done, to cut back on the work needing to be done on the bank holiday weekend itself. Meaning that more weekend working is necessary, and there are only so many weekends available. Some will inevitably clash with some event or another, be it a football match, festival, exhibition, or whatever is important to someone.

 

[simple simon]

I very much understand how longer line closures can result in far more actual work done than a series of shorter closures.
i also understand how using an alternative route can mean that passenger stay on a train - rather than have to use buses for part of their journey.

Despite being a Bank Holiday weekend, this specific BML closure was only on the Sunday.

Probably because it is a bank holiday weekend? However, being a bank holiday weekend means that a longer line block will likely be available, meaning that more work can be done. This probably saves an additional weekend's disruption, meaning overall less disruption.

In part the issues faced by most of the BML are a direct cause of previous rail closures preventing viable alternative routes - this includes sections of railway that are now part of the Croydon Tramlink and the Uckfield - Lewes route. Its all well and good upgrading the BML to the latest digital signalling as a way of cramming more trains on to the route but diversionary routes will still be worth their weight in gold if (for example) there is an issue that forces a line closure.

 

[JonathanH]

In part the issues faced by most of the BML are a direct cause of previous rail closures preventing viable alternative routes - this includes sections of railway that are now part of the Croydon Tramlink and the Uckfield - Lewes route.

Littlehampton seems a reasonable, if a little slow, diversionary route for those who want a through train. It is a shame only 1tph is generally offered when it happens.

 

[Dr Hoo]

Littlehampton seems a reasonable, if a little slow, diversionary route for those who want a through train. It is a shame only 1tph is generally offered when it happens.

(To anybody on this thread.) How much faster would the route via Uckfield be if it was still open (and, presumably electrified and with adequate power supply for a significant number of 12-car trains)? Please include explanations for the assumed configuration at Lewes in the reply.

 

[swt_passenger]

In part the issues faced by most of the BML are a direct cause of previous rail closures preventing viable alternative routes - this includes sections of railway that are now part of the Croydon Tramlink and the Uckfield - Lewes route. Its all well and good upgrading the BML to the latest digital signalling as a way of cramming more trains on to the route but diversionary routes will still be worth their weight in gold if (for example) there is an issue that forces a line closure.

But they're obviously not, are they. Because for almost every ‘obvious’ reopening that gets suggested, industry insiders have explained that use as a ‘possible diversionary route’ doesn‘t improve the business case.

 

[rower40]

I noticed very many pointwork track panels stacked up beside the track at Swinton Junction as my train went through there this morning. The "Forthcoming engineering work" page on nationalrail
https://www.nationalrail.co.uk/engineering-works/sheffield-leeds-9-may-20260509/
suggests that CrossCountry trains are being diverted via Barnsley (i.e. not calling at Wakefield Westgate) on Saturday 9th and Sunday 10th May. Trains to/from Doncaster can be diverted via the Thrybergh line (next to the canal).

 

[Snow1964]

Yes I've thought this was a bit baffling too, they feel the wrong way round given the commuter flow is to/from Bristol, while leisure is largely from London.

Seems to be a strange decision to do midweek blocks one side of Bath and weekend block the other side. Especially as it appears to makes no sense from passenger flows as you have highlighted

Absolutely mess this weekend regardless. It's safe to say the staff are not used to terminating in both platforms, they changed our platform 4 times on Saturday, after having already cancelled the first train! While apologetic they didn't do anything to explain it, and the foul language and abuse a member of train staff directed at a passenger has resulted in a complaint to GWR.

That is clearly poor staff supervision and training. Hollow apologies with no attempt at explanation sounds like tick box filling, when tick box had wrong question asking if apologies given, not if they were explained and understood

Doesn't help that GWR don't seem to have programmed intermediate destinations into some of their trains, so get displays on end and inside of trains showing wrongly confusing everyone by conflicting with announcements (how many years have they had to update destinations?)