Hey AKAK!
I was in my retail DVD store a while back. Picked up a copy of Von Ryan's Express for £8.99. I hadn't seen it for years. That P38G - is that right at the beginning - Von Ryan's plane which he ditches?
Later on as the POW train progresses towards Switzerland, it comes under attack from 3xMe109. Can you tell me which variant of 109 these three planes were?