Site: Bethnal Green Station (1 memorial)
E2, Cambridge Heath Road
The station is on the Central line. It has four staircase exits/entrances, but no exterior building. Although it didn't actually open until after WW2, the partially completed station was used as an air raid shelter, and was the scene of the worst civilian disaster of the war.
Credit for this entry to: Alan Patient of plaquesoflondon.co.uk