Track out of Cannon Street towards Charing Cross/Blackfriars

[D7666]

Wimbledon-Putney-CJ still has a daily service

It does, but is not used these days for regular interval all day engineering blocks diversions, which is actually what was being talking about, although drifting.

Long ago Via East Putney on several Sundays a year could have 4 TPH each way diverted that way.

But nothing like that as been done for years and years now.

Certainly the last time I myself travelled on such diversions moves was in Cig type stock - so that dates it +20 years. I am pretty sure it has not been used for regular interval service diversions in the 202x years, and I'd even suggest not in the 201x years either . The District Line service these days is more intense than it used to be. The SW Windsor lines services too - which makes for more conflicting moves of Up trains over the leads at Wandsworth Town where the Up diversions have to cross both Down Windsor lines, and, all diversions traverse a single line section albeit short. Not impossible but I suggest impractical when it comes to performance risk.

Unsure on this bit - but again there is a possible train crew route knowledge issue - I know of at least one country end SWT depot that I was told by someone based there lost route knowledge on in some time ago (and why I wrote SWT there not SWR, it was lost in SWT days). Obviously quite a lot of crew must know it because of ECS movements to/from WDON, but there are only about a dozen paths in total, and even then a couple of those are Q paths it is not the big use some like to make of it.

 

[NSEWonderer]

It does, but is not used these days for regular interval all day engineering blocks diversions, which is actually what was being talking about, although drifting.

Long ago Via East Putney on several Sundays a year could have 4 TPH each way diverted that way.

But nothing like that as been done for years and years now.

Certainly the last time I myself travelled on such diversions moves was in Cig type stock - so that dates it +20 years. I am pretty sure it has not been used for regular interval service diversions in the 202x years, and I'd even suggest not in the 201x years either . The District Line service these days is more intense than it used to be. The SW Windsor lines services too - which makes for more conflicting moves of Up trains over the leads at Wandsworth Town where the Up diversions have to cross both Down Windsor lines, and, all diversions traverse a single line section albeit short. Not impossible but I suggest impractical when it comes to performance risk.

Unsure on this bit - but again there is a possible train crew route knowledge issue - I know of at least one country end SWT depot that I was told by someone based there lost route knowledge on in some time ago (and why I wrote SWT there not SWR, it was lost in SWT days). Obviously quite a lot of crew must know it because of ECS movements to/from WDON, but there are only about a dozen paths in total, and even then a couple of those are Q paths it is not the big use some like to make of it.

Yeah its not as practical as the Byfleet curve for all day engineering blocks on the SWML one because it crosses 90% of windsor line around poiint pleasant near Wandsworth town aswell as most all day engineering blocks these days are combined together so that main side waterloo if it needs work will also be done with somewhere like surbiton or wimbledon itself, which nullifies the east putney diversion needs.

Windsor side via Byfleet curve is also more resilient as if the richmond area is suddenly blocked then you have hounslow side, if Byfleet curve packs up then you can run train to surbiton and turn them around

 

[Taunton]

(ii) navy Chatham dockyard (big expansion 1836-1851 for iron and steam construction) and Portsmouth foundries (1830s-1850s expansion).

There was a discussion over some months back in the 1960s in, i think, the Railway Magazine, of sections of line where two or more electric trains could run parallel with the same 2-digit headcode. The winner was claimed at four, approaching London Bridge from the east, one of the four being "a Naval Special from Portsmouth to Chatham". So such services were still envisaged then.

A further discussion then inevitably ensued as to whether such a special service would ever be routed via a reversal at London Bridge.

 

[norbitonflyer]

Yeah its not as practical as the Byfleet curve for all day engineering blocks on the SWML one because it crosses 90% of windsor line around poiint pleasant near Wandsworth town aswell as most all day engineering blocks these days are combined together so that main side waterloo if it needs work will also be done with somewhere like surbiton or wimbledon itself, which

It became much less useful after the flying connection on the up line was removed - I understand because the viaduct itself had started to deteriorate. 1980s I think?

 

[NSEWonderer]

It became much less useful after the flying connection on the up line was removed - I understand because the viaduct itself had started to deteriorate. 1980s I think?

That's indeed another part of it. Also you get several compatibility issues occur over very few usage which often leads to decent length power reductions these days, which isn't any fun for the London underground stock thst you thread in-between.