I had the Finns at the same time that I had Kath, and it's clear to me that their accents are really different. Definitely not British. And then I found that Agan has a slightly different accent then Nog, Lommy and Greenie do, even though I believe she grew up in the same area as they did. And if you were to talk to Rune I find his accent sounds very British, though he is from Denmark. I guess it depends on how/when/from whom, they learned English. I just think they all sound really awesome.
edit: wow, x'posted with Kath, haha