The RMT has caused commuter chaos with its 24-hour strike for workers on the underground network.
The industrial action went ahead after 11th hour discussions between union chiefs and tube bosses broke up after just 10 minutes.
The stoppage began at 6.30pm on Tuesday – and has caused traffic chaos throughout the Capital.
It is thought that most lines will be totally closed, leaving commuters scrambling to get on buses, taxis, overground trains or a specially chartered riverboat service.
A planned strike on the entire UK rail network was cancelled last week after train bosses agreed to reopen a final salary pension scheme.
But the stalemate over pay and conditions of those working on the underground network shows no sign of abating.
Earlier this week, Bob Crow, the leftwing general secretary of the RMT union, announced that he was standing down from the board of Transport for London following a clash with mayor Ken Livingstone.
The strike is likely to lead to further traffic disruption in London on Wednesday – with many workers choosing to take the day off rather than attempting the negotiate the Capital without the underground system.
A full service on the tube network is unlikely to be restored until Thursday morning.
