I don't think it has been networked on UK-wide BBC yet, but there is an outstanding documentary, anchored by Jools Holland, trying to distill the essence of the 'London Sound'.

It has some great interviews with Ray Davies of the Kinks, Joe Brown of the Bruvvers and also Roy Hudd, but the show-stealer is Eliza Carthy and Mawkin knocking out the original version of St James Infirmary Blues.

This is a Must See