"Another possible result had Britain remained neutral in WW1 is that WW2 may not have happened. My Dad would not have left Poland."

See anything monstrously wrong with that Gnome? Ah sod it I'd hate to see you struggle, but it is blindingly obvious -

Had Britain stayed out of WWI then there would never have been a Poland for your Dad to leave - By God are you bone thick or what???

What facts of mine are wrong Gnome?