As Brits we tend to be rather dismissive of the idea that we could ever be ruled, even benignly by a military dictatorship, because, well, it's just not British.
So I got to thinking, what events of the 20th Century, if spun differently, could cause Britain to be ruled by a military dictatorship.
Doesn't have to be a right-wing dictatorship, infact I'd be more impressed if it were a left or centerist dictatorship, only thing, it would have to survive, even if on it's last legs, until 2012.
Could somewthing like an attempted Bolshevik or Communist revolution either in the mid to late 20's or the 1970's cause it, or soemthing more mundane?