As well as the mainline railway stations above ground and subsurface platforms for the Metropolitan , Circle and Hammersmith & City lines , there were platforms deeper underground for the Northern , Piccadilly , and Victoria lines .

The fire started Process_start under a wooden escalator serving the Piccadilly line and , at 19:45 , erupted Process_start in a flashover into the underground ticket hall , killing 31 people and injuring 100 .

The train bombings Terrorism occurred Coming_to_be on the Circle line near and at Edgware Road , and on the Piccadilly line near .