I was sent off to deliver a direct mailing and rather embarrassingly got locked inside a community garden area in New Barn Street. In order to deliver to ground floor flats in the block I went through an entry door without checking I could come back through it! You had to have a special block key to do so.
After 15 minutes trying to work out how to get out I gave up and knocked on the door of the flat nearest the entry door. Happily they didn't mind and were strong Labour Party supporters and let me out.