UK sportive events this year so far -

Southern - Sussex - 10 September http://www.ctc.org.uk/DesktopDefault.aspx?TabID=3692

Falling Leaves – Dulwich to Westerham – Normally first week of October
Route - http://www.wallygimber.freeserve.co.uk/leavesroute.htm
Registration - Not yet active

South Downs Challenge - August 20th 2006 http://www.cyclegb.co.uk/cyclosportive.asp

TBC
IoW Randonee/Festival - 16th-24th September 2006
http://www.sunseaandcycling.com/

http://www.cyclosport.co.uk/events.asp has a list of some of the better known ones.