LLC - If you want a Yak, try anglia flight,
www.anglia-flight.com or call on 01603 412 888. Otherwise Dawn Patrol do the course in an Extra 300L. Personally, I want to do it in something underpowered and unforgiving - the extra bears little relation to anything a poor PPL like me will ever get my hands on! I also called Pilot Flight Training at Oxford who do it on a slingsby. Thanks for the AOPA link though, will be busy calling them all tomorrow!!!