The demolition of part of an east London terrace is due to get underway today after cracks in the building were spotted over the weekend.
Officials are hoping to save four flats and a restaurant in another section of the structure, but one other restaurant and three flats will be knocked down first.
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Tubes, trains, trams, buses, cable cars, river buses, taxis and going by foot - your guide to getting around 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.