Coming from the other direction, how about 25 minutes logged on a Tiger Moth at Duxford? It was a qualified instructor in the back seat and he said it would count if I took it further.
I always intended to learn to fly when I had enough money but then I made a mistake and got married, so I've never managed to hold on to enough cash to do it. So I content myself with the technical side of flying, being an engineer (albeit not aviation related) interested in worst-case design and failure analysis.