British is a vague term since it encompasses Scottish, Welsh, south and north English (which are very distinct from one another), Cornish (southwest England) and Irish (NI) as well as by extension any country previously or currently part of the British Empire/Commonwealth.
Of course one can gather in due course that every American referring to a 'British accent' means the southern English one, but it presents quite a dilemma for the rest of the population, so please be specific to the level of constituent country and don't just say 'British pepul r sexi hurr' or I'll find you some foreign Commonwealth person who barely even speaks English.
Anyway, for me: Finnish. It's not attractive or anything, course, I'm asexual; it just sounds nice.