"Mr Thant" wrote in message
...
On 2 Apr, 15:09, Tom Anderson wrote:
Has anyone proposed a flyover somewhere that would allow them to get on
to
the through lines without conflicts? I know there are all sorts of
planned
bits of infrastructure down there, and i can't keep track of them.

Only two that I know of:
- A flyover just east of London Bridge allowing trains from points
south towards Thameslink can cross over trains from points east to
Charing Cross (not sure exactly which lines)
- Doubling "Tanners Hill flydown", which is a flying junction just
west of Lewisham. Again, not sure exactly which trains make use of it.

The change of mind about the destination of the Thameslink trains via
Elephant & Castle (6tph in the peaks) means that they will all run via
Catford, while trains via Herne Hill (Wimbledon Loop and Kent House) will be
kept quite separate on the west side and terminate at the new bays on the
upstream side of Blackfriars.

The grade-separated junction at Bermondsey will actually be a diveunder to
take Thameslink trains under the Charing Cross lines and the down London
Bridge - New Cross Gate slow line. In the same area is the flying junction
giving northbound ELLX trains their own route from the up side of New Cross
Gate to the ELL.

The Tanners Hill spur is being doubled as the presence of Thameslink trains
in the middle of the Greenwich viaduct will mean that Charing Cross trains
will not easily be able to access the slow lines west of New Cross, so will
have to use the Tanners Hill spur to reach Lewisham.

One other possible flyover that is discussed in the RUS, but kicked into the
long grass, is one at Herne Hill to separate Elephant & Castle to Tulse Hill
flows from Victoria to Kent house trains.

RUS thinking is that Thameslink to South Eastern via London Bridge trains
will run down the Tonbridge Main Line, rather than the previous proposal to
run to Dartford (via Bexleyheath and via Sidcup) - this is apparently easier
to path in the Lewisham area, and makes up for a likely reduction in Cannon
Street - Tonbridge Main Line trains. At present some Cannon Street trains
run ecs to/from or via Blackfriars Reversing Sidings, but the Cannon
Street - Metropolitan Junction spur is being taken out for Thameslink, so
all Cannon Street ecs will have to run via London Bridge, and this will
limit the capacity of London Bridge to 20 tph.