I saw it on a documentary several years ago but have no been able to find it since. I've had several arguments with people about whether the UK would of been able to repel an invasion and due to these war games it was "proven" that the UK was, from my memory.
I would love to find this again, if anyone can help? Also, apologies about technically not fitting the rules (I think) so to help with the rules, if anyone wants to explain about this that would be great.
Have a look here for a summary of the 1974 Staff College exercise.
I am personally a little bit skeptical of the exercise' optimism about this first line here:
The first wave of a planned 330,000 men hit the beaches at dawn.
As I have outlined here the German difficulties with simply getting across the channel would have been almost insurmountable, a factor that seems to have been largely omitted from the war game.