David Cameron tweeted this morning his pledge to "fightback" on HS2 after a barrage of criticism cast doubt on the high-speed rail project's future.
The fightback on #HS2 begins today with the Transport Secretary, Patrick McLoughlin, highlighting the huge benefits to the UK & our economy.
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Tubes, trains, trams, buses, cable cars, river buses, taxis and going by foot - your guide to getting round during the strike.
Union officials rejected a revised offer from Underground managers during a meeting at the conciliation service ACAS this afternoon.
Train drivers were offered £200 a shift to work on the new 'Night Tube' in a bid to halt the threatened walkout.