

It's very interesting to speculate on what might have happened if any major event in history had been changed in some way. I'm all for it providing that the authors of novels or films based on these ideas make it clear that this is fiction. Too often we see these so-called documentaries & feature films that bear very little relation to the truth. People watching them without knowing the true history tend to believe what's shown in the film. This is what annoys & upsets me about programmes like the one Eno mentioned.
As you seem to have a rich imagination it might be worth studying what life was like for ordinary people living in Britain in 1940. This would make your "movies" even more convincing.

I don't know if it's available where you are but I was given a very interesting little book named Aces, Erks & Backroom Boys. This would give you some idea of what life was like for many of these ordinary people. It's well worth a read. IMHO
http://www.amazon.co.uk/exec/obidos/ASIN/0304359270/wwwlink-software-21/202-8049846-9218207