Don't know if this is the film DamienB is refering to but I read recently a story about POWs interned in Ireland. All nationalities and a fairly jovial sort of affair. An American flying over to Europe, didn't quite make it and ended up getting interned. He subsequently escaped (not a difficult feat) and made it to his unit, only to be told the Air Force was quite unhappy with him and he had to go back to Ireland.
His frustration stemmed from being all fired up to go to war and felling like a malingerer being stuck in Ireland. However, it was considered inportant for Ireland to remain neytral and interning servicemen from both sides was a way of showing the neutrality, so his sojourn there was another, albeit unsung, part of the overall war effort.
I think I read this in a colour supplement a while back. The article mentioned they were thinking of making a film of the event. There was something to do with a train set as well if I mremember correctly.