cjboy is correct as far as I know. Anyway, other nation's airforces use them as a primary trainer. Can't remember them off hand, but I'm sure a ppruner will come along soon with the details.
Stapleford have at least one. I did an hour aerobatics in it - fabulous fun. Mind you, compared with a Cessna 152, any low-wing, high-power aircraft would be!
