TRANSPORT for London is warning that some of its services will be disrupted if the threatened strike of RMT and TSSA members at Network Rail goes ahead.

Talks aimed at ending the dispute are believed to be continuing at Acas, but the railway industry has been forced to announce emergency timetables.

TfL said a 24-hour walkout from 17.00 on Monday would affect its services on Monday and Tuesday and also into Wednesday morning.

The only Overground services which can continue will be on the core part of the East London Line, between Dalston Junction and New Cross or New Cross Gate, where the infrastructure is managed by TfL, but even here services will be limited to 08.00-13.00 on Monday and 08.00-17.00 on Tuesday.

Some suburban sections of the Underground will be hit, with no Bakerloo trains running between Queen's Park and Harrow & Wealdstone and no District trains between Turnham Green and Richmond on Monday and Tuesday. There will also be no District Line service between Putney Bridge and Wimbledon after 17.00 on Monday and all day on Tuesday.

TfL said most of its services can continue, because staff employed by TfL or its contractors are not involved in the dispute. However, the lack of National Rail services will put pressure on TfL. It said: "Some London Underground and DLR stations, particularly those in south London, as well as the entire tram network, are expected to be much busier than usual and managed queuing systems may be in place."

Extra buses will be running in south London, and TfL is urging its passengers to stagger their journeys and avoid the busiest parts of the peak if they can.

Meanwhile more National Rail operators have announced their contingency plans.

There will no Virgin services on the West Coast Main Line on Monday or Tuesday, while Virgin Trains East Coast will run services until the early afternoon on Monday. On Tuesday there will only be limited services between London and Leeds, and London and Newcastle.

Merseyrail services will have stopped by late aftermoon on Monday, and there will be no trains on Tuesday. Some early morning trains may also be affected on Wednesday.

London Midland is warning that 'very few trains will run and rail travel will be very difficult on both days'. There will be no trains on most of the LM network, but limited services will run between 07.30 and 18.30 on Monday and Tuesday between Coventry and Wolverhampton, Kidderminster and Dorridge, Kidderminster and Stratford-upon-Avon via Shirley, Stourbridge Town and Stourbridge Junction, and Coventry and Nuneaton. There will also be a service on the Marston Vale Line between Bedford and Bletchley on Tuesday only.

Heathrow Express trains will stop running by 18.30 on Monday, and trains will only run between 07.30 and 18.30 on Tuesday. Heathrow Connect services are not expected to run on either day.

South West Trains has already said its entire network will be closed on Tuesday, and there will be no trains on some East Midlands Trains and First Great Western routes. There will also be very few services in Scotland.