Five weeks and thirty hours ( an approved course) in 1962, Kidlington. It would have been four weeks but I took a week off to do a CCF camp at Bicester.
Learned on Colts but managed transition to Chipmunk, Auster Terrier and Tripacer as well. Good deal because our Math teacher had a Chipmunk at Kidlington and we got to 'borrow' it for the price of gas.