So you are saying that the UK while fighting Germany would be willing to risk another war but when they only had a rebel army to face they didnt?
What is Greece going to do? They would have to be suicidal to start anything, and if they do, the Royal Navy makes the Aegean into a live-fire training ground. Greece couldn't beat Turkey, what hope do they have against Britain? It'd be like Cuba trying to seize Miami.
The only hope they have is Britain not doing anything out of sheer pity, or dying from laughter.