[Neffiline]

I know, I know! I was just teasing you! ^-^

I'd assume that if she/he lives in England, then their english would be pretty good. Though it does depend on where and how they were raised.

I was born and raised in a family that only spoke French. Then learning English in school, and these days, I use english more than I use french, or at least on an equal basis. Even if I have a small accent, it's not big enough so that people can't understand me. Having an accent isn't necessarely a bad thing, as long as others can understand you correctly, without having to try figuring out what the hell you're saying.