"well there was George Formby - who was singing mainly jazz tunes. Noel Coward. Ian Dury...."

well there you go. Nick Drake's "Family Tree" album features his early home recordings, on which he's singing many blues standards in his own middle-class accent.

I'd personally rather hear that than a put-on American accent.

But it's not such a huge sticking point for me that I can't enjoy, say, JoAnn Kelly's singing on her fantastic first album (which is entirely American-accented).

What I'm saying is, of all the British singers currently singing blues, Sunjay Brayne seems like a very poor target to pick in terms of "singing in an American accent". By and large, he doesn't! The occasional line maybe. Whereas up and down the country, you'll find billions of blues bands who do.