TOPSHOTS Commuters cross the river Thames on the Millennium footbridge as a tube strike hits the morning rush hour in the city of London on August 6, 2015. Millions of Londoners were forced to walk, cycle or take packed buses to work today as Underground staff staged a second strike in a month over plans to run trains all night at weekends. London Underground staff walked out yesterday evening and will not return until the morning of August 7, causing a shutdown of all 11 lines on the subway network and severely disrupting the capital. AFP PHOTO / BEN STANSALL