A Second World War bunker beneath a school still features children's graffitti from more innocent times - including “Betty Clease is a fool”. The underground air raid shelter used to hide hundreds of children from German bomb raids across Bristol during the 1940s. During the Blitz the kids would scrawl on the walls and their doodles and comments are still scribbled on the brickwork tunnels. The drawings reveal how times have changed - with no swear words or gang tags.