Jau, Although BAFC have Warriors, as far as I know they do their PPL training in PA-38s (Tomahawks). Do you have a specific reason for wanting to do your PPL in a 4 seater rather than a 2 seater? A lot of people do their PPL training in 2 seaters, and then convert to the 4 seater once they'll got their license. Its usually cheaper this way.
Brooklands