Chris I had real trouble trying to think which was my favourite war film and also thought of The Great Escape and Ice Cold in Alex along with 633 Squadron, Bridge On The River Kwai, Shindler's List, Mash.
Did you know in the lager drinking scene from Ice Cold in Alex John Mills was drinking real lager and had the dubious misfortune of having to do numerous takes, he was rather wobbly by the time shooting was finished.
Those Magnificent Men in their Flying Machines pure light hearted enjoyment with baddy Terry Thomas and I love the music from excellent The Horse Soldiers.