Well actually most of that is right mate, squire and mug, well I've never heard many people say that before. Mate is basically another word for friend, or comrade! Bloody hell does somehow mean "What the fuck", but it could also mean "Holy shit" or "Holy cow", anything really that relates to a sudden shock. "Bleeding Yank", well I don't think many of us say that, fact is, I bet only old people who live in Britain would say that due to the reference being "Yank", which refers to American soldiers in WWII. I don't know about mug, probably does mean what an ass, but to be honest, I'm not sure, I never hear anyone in the streets talk like that.
As you know, I've lived in Britain most of my life, but the two words "Mug" and "Squire", well I've heard them before, just never knew what they meant. I assume this is a type of traditional talk back in the early days. Hope this helps Husky.