• Our new ticketing site is now live! Using either this or the original site (both powered by TrainSplit) helps support the running of the forum with every ticket purchase! Find out more and ask any questions/give us feedback in this thread!

Chiltern MK5s Starting 2026 (non speculative updates thread)

CR165022

Established Member
Joined
12 Nov 2019
Messages
1,383
Location
Buckinghamshire
Not quite sure what the fault with 68025 is this morning but it's progressing very slowly out of Marylebone and is getting terminated at Wembley.
 
Sponsor Post - registered members do not see these adverts; click here to register, or click here to log in
R

RailUK Forums

vuzzeho

Member
Joined
11 Apr 2022
Messages
667
Location
London
I don't remember if it was confirmed before or not, but I've now seen a photo of 12802 at Long Marston confirming it's in blue now.
There’s something here! (sorry for photo quality, has to use 10x zoom on my phone)
 

Attachments

  • IMG_5755.jpeg
    IMG_5755.jpeg
    1.2 MB · Views: 207

trainmania100

Established Member
Joined
8 Nov 2015
Messages
3,032
Location
Newhaven
I'm not familiar with Chiltern but a brief lookup for 68s today shows nothing out, is this the case? I do note some missing Chiltern allocations today as of this morning.

Are 68s no longer frequent on Marylebone services now?
 

Peter Mugridge

Veteran Member
Joined
8 Apr 2010
Messages
17,815
Location
Epsom
I'm not familiar with Chiltern but a brief lookup for 68s today shows nothing out, is this the case? I do note some missing Chiltern allocations today as of this morning.

Are 68s no longer frequent on Marylebone services now?
It looks like the allocations simply aren't showing.

Can anyone in the Chiltern area provide Mk 1 eyeball for us please?
 

172007

Member
Joined
2 Jan 2021
Messages
1,144
Location
West Mids
What are the LHCS stood down for?

I guess DRS are using 68's today on freight how are they performing?

Can't see any 3Q's out today for Chiltern, surely it would be sensible to use 2 x 68 and a MK5 set to see hot weather performance with a second 68 as insurance?
 

37052 xb mr

Established Member
Joined
6 Dec 2023
Messages
1,225
Location
Stockport
What are the LHCS stood down for?

I guess DRS are using 68's today on freight how are they performing?

Can't see any 3Q's out today for Chiltern, surely it would be sensible to use 2 x 68 and a MK5 set to see hot weather performance with a second 68 as insurance?
A lot of the whole rail network
Has mass cancellations till weekend
Because of the hot weather,
Speed restrictions etc
Units tend to cope better with the air conditioning than the loco hauled stock, its passenger comfort
Rather than loco performance
 
Joined
18 Mar 2007
Messages
459
Location
North Oxfordshire
68 hauled sets also require a guard south of Banbury, units do not, so that gives a bit more flexibility if short-notice substitutions etc are required. Also gives the option of diversions via the Met line if the main line is shut (as I believe the 68s are not tripcock fitted).
 

168lover

Member
Joined
2 Aug 2013
Messages
628
Location
Chiltern Mailine Land
Potentially a set or two coming out this afternoon, just been past Wembley Depot on a very crowded 2 car 165 (why not increase the capacity of the trains you are running on a reduced timetable?) and saw two sets powered up by the depot exit.
 

37052 xb mr

Established Member
Joined
6 Dec 2023
Messages
1,225
Location
Stockport
The regular 68 diagrams
Have been cancelled or replaced by units today, as there are 3 sets at Stourbridge already
I would be surprised if any worked
From London tonight
Unless it’s an out & back trip
 

800002

Member
Joined
19 Jun 2019
Messages
1,110
Chiltern & LNER stood down
TFW still running 5 x 67s & MK4’s sets today
What are the LHCS stood down for?
Because of the predicted heat.
Because NR 'invited' operators to reduce their service levels, due to said predicted heat.
'Less services on the network = better resilience'
Lack of LHCS = 2 birds, one stone.

Can't see any 3Q's out today for Chiltern, surely it would be sensible to use 2 x 68 and a MK5 set to see hot weather performance with a second 68 as insurance?
The LHCS (or rather thier HVAC) cannot adequately support the 'extreme heat events'. This has been proven in the previous 4 to 6 weeks.

As for the lack of 3Q paths, file that under the reduction of train service category.
Running a second loco on the formation doesn't change the capability of the HVAC unit(s).

It's not generally the locos which have been letting the side down.
 

Jacob Porrett

Established Member
Joined
28 Jan 2022
Messages
1,943
Location
Telford
Because of the predicted heat.
Because NR 'invited' operators to reduce their service levels, due to said predicted heat.
'Less services on the network = better resilience'
Lack of LHCS = 2 birds, one stone.


The LHCS (or rather thier HVAC) cannot adequately support the 'extreme heat events'. This has been proven in the previous 4 to 6 weeks.

As for the lack of 3Q paths, file that under the reduction of train service category.
Running a second loco on the formation doesn't change the capability of the HVAC unit(s).

It's not generally the locos which have been letting the side down.
Aren't the 3Q paths for testing purposes which means they only run on a run as required basis?
 

JamesT

Established Member
Joined
25 Feb 2015
Messages
4,846
Because of the predicted heat.
Because NR 'invited' operators to reduce their service levels, due to said predicted heat.
'Less services on the network = better resilience'
Lack of LHCS = 2 birds, one stone.


The LHCS (or rather thier HVAC) cannot adequately support the 'extreme heat events'. This has been proven in the previous 4 to 6 weeks.

As for the lack of 3Q paths, file that under the reduction of train service category.
Running a second loco on the formation doesn't change the capability of the HVAC unit(s).

It's not generally the locos which have been letting the side down.
I could understand older rolling stock having aircon that can't cope with this weather, but surely modern rolling stock such as the Mark 5a should have something decent? Especially as they were built in Spain where these kinds of temperatures aren't as exceptional.
 

37052 xb mr

Established Member
Joined
6 Dec 2023
Messages
1,225
Location
Stockport
I could understand older rolling stock having aircon that can't cope with this weather, but surely modern rolling stock such as the Mark 5a should have something decent? Especially as they were built in Spain where these kinds of temperatures aren't as exceptional.
They had some aircon issues with TPE previously.
Not sure re Mk5s,
But the MK4’s are only advised to
28 degrees outside temp.
 

800002

Member
Joined
19 Jun 2019
Messages
1,110
I could understand older rolling stock having aircon that can't cope with this weather, but surely modern rolling stock such as the Mark 5a should have something decent? Especially as they were built in Spain where these kinds of temperatures aren't as exceptional.
*not an answer*
Could it have been spec'd all those years ago (must be nearing a decade) to a suitable temperature window in use at the time.
Must remember such things could be written into the design?

Where they are made could be entirely coincidental.
 

Kite159

Veteran Member
Joined
27 Jan 2014
Messages
22,755
Location
West of Andover
I could understand older rolling stock having aircon that can't cope with this weather, but surely modern rolling stock such as the Mark 5a should have something decent? Especially as they were built in Spain where these kinds of temperatures aren't as exceptional.
Certainly on the loco hauled set on Sunday, the (declassified) first class coach was quite warm. I guess more down to the poor design of the bottom of the window AC vents being blocked by the tables. The 168 in comparison was cold
 

Kite159

Veteran Member
Joined
27 Jan 2014
Messages
22,755
Location
West of Andover
How did you hear it was declassified? That’ll make it much busier.
Chiltern Journey Check had it listed as full & standing from Marylebone with First Class declassified, by the time it reached Leamington Spa the front coach at least was half full when I boarded.
 

800002

Member
Joined
19 Jun 2019
Messages
1,110
Chiltern Journey Check had it listed as full & standing from Marylebone with First Class declassified, by the time it reached Leamington Spa the front coach at least was half full when I boarded.
That's a positive step.
Many onboard / stationborne/ departure board information though?

One assumes declassification, once enacted, is not reversed en route (for example if 75% of the passengers bailed at Bicester, for example.
 

Kite159

Veteran Member
Joined
27 Jan 2014
Messages
22,755
Location
West of Andover
That's a positive step.
Many onboard / stationborne/ departure board information though?

One assumes declassification, once enacted, is not reversed en route (for example if 75% of the passengers bailed at Bicester, for example.
Nothing mentioned it at Leamington Spa itself, the screens were still suggesting that upgrades were available (seemingly does that for all the 68 hauled sets). No sign of the guard (they hid away in the staff area at the front of the coach, only popping out to do the doors at the various stations). The general rule is once a train has been formally declassified it can't be reversed if the train empties out
 

Top