London Eye
http://www.londoneye.com/

Time Out London
http://www.timeout.com/london/

London Net
http://www.londonnet.co.uk/

Visit London
http://www.visitlondon.com

Theatre Guide
http://www.londontheatre.co.uk/

Madame Tussauds
http://www.madame-tussauds.com/