The sale for the following UK dates starts today at 9am:

06/14/2005 - Manchester, England - City of Manchester Stadium	Ticketmaster	Seetickets
06/18/2005 - London, England - Twickenham Stadium	Ticketmaster	Latestevents
06/19/2005 - London, England - Twickenham Stadium	Ticketmaster	Latestevents
06/21/2005 - Glasgow, Scotland - Hampden Park	Ticketmaster
06/29/2005 - Cardiff, Wales - Millenium Stadium	Ticketmaster

And note this from the TM site:
Performance Information:
Please note: You are strictly only allowed to make one booking for this tour. There is a limit of 4 tickets per booking and because you can only make one booking, you can only book for one venue. Therefore you will be unable to book for more than one venue and unable to book for more than 4 tickets at your chosen venue. Multiple bookings will be cancelled without notification.
Tickets may not be despatched until ten days before the concert.

Update 10am CET: Sale just started and Ticketmaster is already sending error messages. A 2nd London shows has been added on June 19th.