Fresh attempts will be made today to try to settle a long-running dispute which threatens to paralyse London's tube system.
Underground workers are due to strike on Wednesday in protest at plans for the new 24-hour 'Night Tube'.
Officials from four unions, RMT, Aslef, TSSA and Unite, have spent the weekend considering a new offer from London Underground.
Drivers will be allowed to refuse to work night shifts but will no longer be eligible for a £2,000 lump sum incentive.
Tube drivers who agree to work on the night tube will instead be paid an extra £200 per shift.
London Underground says the new deal addresses union concerns about 'work/life balance'.
One union, Unite, has already rejected the proposal but talks at the conciliation service ACAS are due to restart this afternoon.
- If the strike goes ahead, Tube services will stop running at 6.30pm on Wednesday
- Tube services are expected to be exceptionally busy between 4.30pm and 6.30pm
- Staff on the bus network, DLR, London Overground, tram and TfL Rail services will not be on strike
- There will be no Tube services all day on Thursday
- Extra bus and river services will run, and all other public transport services and roads will be much busier than usual