Head of Toast wrote to uk.transport.london on Sun, 31 Oct 2004:

They are generally open and closed automatically on the tubes. infact, in 10
years on living in London, I can't remember having to open/close a tube door
myself.

Obviously you never travel on the District line, then.
--
"Mrs Redboots"
http://www.amsmyth.demon.co.uk/
Website updated 31 October 2004