I have just learnt that the 1966 episode of The Blackpool Show featuring Freddie "Parrotface" Davies at the height of his fame can be found on a newly released Blu-ray edition of The Punch and Judy Man; Tony Hancock is hosting the show, hence its inclusion.
As far as I am aware this is the first legitimate release of this programme, the only one which survives of the series; Bob Monkhouse also appears, so possibly the recording originated from his famously extensive collection.