I'm writing about Welsh characters, and set in Wales but with a mixed group of people. What I'm looking for are both the sort of rude jokes you'd make about the Welsh (sheep shaggers), the kind of non-offensive assumptions that are made about the people and the country (for example, where I live 'always raining' is an assumption) and similar things. I'm looking for way to include the sense the story is in Wales and involves the Welsh (and other English folks) and thus need some atmosphere to do so.
Obviously, I know nothing of the place, I'm an American.
ETA: Thanks everyone! I got a lot of useful information from you'all.