Jim,
"We declared war on Germany..."
Oh, piss off Keith -

It really is true Jim.
Look it up.
1939 and 1914, both times in response to German aggression and invasion of a neutral country we were treaty bound to defend.
Nothing remotely "imperial" about that.

And communists believed in revolution and subversion.
They did.
Sorry.

And MI5 did not have the time or resources to follow round thousands of SCW vets to see what jobs they were applying for.
Of course I do not believe that story.