The Docklands Railway also has a London Transport style livery featuring an LT Roundel on the front. 
This example was seen on a Lewisham bound train at Pudding Mill Bow E.London on the 29th March 2004.
<p>

Photo from James & Martin's Picture Collection Copyright 'Jampics' m.hawkes7@ntlworld.com 
<p>

British and Foreign Railway Pictures <A HREF="http://jampics.fotopic.net/"> Jampics Fotopic.</a>