Thanks, both! I suppose I have the entire history of Europe in the last half of the last century to play with - which is just about my lifetime, also. (Maybe I'll throw in significant events like "Grandma Ruth gets married"!)
It's going to be a long, long time in the making, Ed - I'm in the middle of moving house for a start. Then the base map needs quite a lot of work to re-jig it for this scenario. And then there is, as you both say, the need for some interesting events along the way. Trade disputes, Bosnia, de Gaulle saying "Non!", Thatcher, Maastricht, etc. I'm open to any suggestions anybody has, but I won't be able to respond any time soon as I'm losing my internet connection for a while.