Hang on. I'm not denigrating anyone for being the wrong colour, and I quite agree, there are some very good white blues singers out there. In fact there always have been, as anyone who's into early country music knows full well.

It's just that I don't think the vast majority of white blues bands from the 1960s had much idea of what they were doing. There were obvious exceptions. EG., Cyril Davis and Alexis Korner. Also Eric Clapton, whose spot on Friday's programme I thoroughly enjoyed. But most of the rest should have stayed very firmly in the BBC vaults with a note saying 'Not to be broadcast while Fred McCormick's alive'.

Anyway, that clip of Son House performing Death Letter Blues was overwhelming and awesome. I've just renewed my tv licence and now I know it was worth it.