These are some files that capture potentially useful information.

British Summer Time start and end dates (webcal)
Recurring appointments from 2003 onwards that follow the appropriate EU rules. Hopefully you should be able to import this data into most organizer-type applications. I've tested this with Ximian Evolution.

$Id: index.html,v 1.3 2005/01/18 16:07:26 mhw Exp $