[dragonwriter]

> Generally it appears the TTS systems all do US accents and the British accent tends to sound like Frasier - an American faking an British accent.

Frasier Crane's accent is an American actor portraying an American character who (with variable intensity depending on situation) is affecting, over the character's own natural accent, either a constructed American accent (the Transatlantic) or a natural American accent (Boston Brahmin), there is some dispute about which or whether its a blend, both of which share some features (in the former case, by deliberate construction) with British pronunciation.