Robin May wrote to uk.transport.london on Mon, 1 Nov 2004:

Mrs Redboots wrote the following
in:

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.

The buttons never work on the District line, the doors are always
opened by the driver. They stopped using those buttons years ago.

Hmm - never noticed it. Shows how observant I am..... and I was using
the District Line quite regularly a few months ago, too!
--
"Mrs Redboots"
http://www.amsmyth.demon.co.uk/
Website updated 31 October 2004