The entire London Underground network is set to be closed down tonight after talks failed to avert a 24-hour union walkout.
Tube services will start ending from around 6pm although they will be exceptionally busy from around 3pm Transport for London said.
There will be no service at all on Thursday across all 11 lines and 270 stations.
The Rail, Maritime and Transport union (RMT), Transport Salaried Staffs Association (TSSA), and Unite members plan to walk out at 6.30pm, while Aslef drivers will begin another coordinated action from 9:30pm.
The DLR, London Overground and buses are not affected and extra bus and river services will run however roads and all public transport will be much busier than usual.
RMT said no further negotiations are planned following the break down of talks yesterday evening.
General secretary Mick Cash said: 'Despite strenuous efforts by union negotiators to press London Underground to address the issues of fairness, safety, work/life balance and equality at the heart of this dispute they have come up with nothing in the talks this afternoon.
'The action is on and RMT will be mobilising picket lines and effective action with our sister unions and there are no further talks planned at this stage.'
Almost 20,000 members of the four trade unions are due to take part in the strike in a dispute over the new all-night Tube services set to begin on certain lines from September 12.
Unions rejected a 'full and final' pay deal from London Underground bosses which included an average 2% increase on basic pay this year, a pay increase of RPI or 1% (whichever is greater) in 2016 and 2017, a £500 non-consolidated 'launch bonus' to all staff on night Tube lines or at stations serving those lines and a £2,000 'transition bonus' for drivers working on the overnight services.
The talks ended in turmoil yesterday, with unions accusing bosses of not caring if negotiations to break down. LU chief operating officer Steve Griffiths rejected this and argued it was never suggested an offer would be withdrawn if unions did not respond on Monday.
He said: 'Many of our staff will not be affected by the new services as we are operating Friday and Saturday night services on five lines. We are also hiring 137 more train operators specifically to work on the night Tube.
'For those who are affected, it will mean a few extra nights per year within the existing working week. No-one is being asked to work more hours than they do now. We are not asking staff to work unlimited nights and weekends.'
Chiltern Railways will also be effected by the London strike and passengers are advised to check with the operator for details.
- There is also a planned 48-hour strike on First Great Western with the operator stating running a revised timetable from 6.00pm tonight.
