Thanks are due to Mr Sandman for linking some interesting clips. Whilst pursuing one of them I stumbled across this hour-long film - apologies if its been linked already:

Bert - a portrait of A.L. Lloyd

I must say that, the more I listen to Bert's singing on some of these previously unexplored recordings (I never heard him live), the more interesting I find his singing. The way he hits his high notes (which, like Phil Tanner, he clearly enjoys) is pretty thrilling at times.