With all due respect, mate, that's a load of old bollocks.
Ayup, lad.
It's hardly surprising that a provincial such as yourself would cherish such a misapprehension.
In the spirit of international charity, please allow me to help you to learn something:
Saint George's Cross, also called Cross of Saint George, is a red cross on a white background.
Sometimes associated with Saint George, the military saint, often depicted as a crusader from the Late Middle Ages, the cross has appeared on many flags, emblems, standards, and coats of arms.
Its first documented use was as the ensign of the Republic of Genoa, whereafter it was used successively by crusaders.
The symbol has since been adopted by the Swabian League in the pre-Reformation Holy Roman Empire, and it was introduced as the emblem of several countries and cities which have or had Saint George as a patron saint, notably the Republic of Genoa, the Duchy of Milan, England, Wales, and Georgia in the Caucasus Mountains of Eastern Europe.
The cross is also the main feature of the Ulster Banner, formerly the Flag of Northern Ireland, and thus appears on the badges and flags of some Ulster loyalist groups, such as the Ulster Volunteer Force.
https://en.wikipedia.org/wiki/Saint_George%27s_Cross
Now, before the lesson concludeth, can tha tell me what Crusaders did to Muslims?
If tha gets it correct, tha could be on University Challenge someday.