Never knew Derek Lamb, but I discovered his Folkways 'Music Hall' LP only a short time ago, and it is a current favourite. His delivery was very detailed and humourous. It seems he was American by nationality, but his singing sounded quite authentically Cockney, at least to my untrained ears.

Wondered what else he had done in the way of music, as internet searches revealed nothing. But it seems he certainly had an intersting career as a filmmaker.