If you visit Manchester, avoid Moss Side. As for London, I have no idea. Their southern ways are alien to me.
Sounds lovely. It's cold in Canada, but really fuckin' hot in the summer, which I do not like. Probably 'cause of those American bastards, stinking up the continent.
It's been quite hot in the early summer here, though we probably only consider that hot because the rest of the time the weather is grey and dreary.