If you are interested in Yak flying, I can only repeat earlier endorsements of Gennady Elfimov at Skytrace, Wolverhampton Business Airport. If you undertake his entire Safety Course, you will come away thoroughly familiar with Yak 52 operations and probably be pretty competent at Standard Level aeros. Which is a bit of a bonus if, like I was, you have not flow a stick and rudder high power aeroplane before....Here's the link again:
http://www.skytrace.co.uk/
Have fun.