You can go into almost any of the hundreds of flying clubs dotted around the UK and find some ex-RAF and ex-University Air Squadron pilots who flew Bulldogs in their time. And I expect almost as many civilian pilots have had a go since the RAF sold them off in 2001. There are over fifty Bulldogs listed in G-INFO, a number of which are available for training.
Is the full quote. Given there are approximately 300 registered training organisations and many older instructors that seems pretty reasonable - why do you consider it bizarre?