The Radio Times, dated December 25th, 1965
The 'Mother Goose' panto features Jon Pertwee, and one of the named singers is David Fisher (but presumably not the one that wrote 'The Stones of Blood', 'The Androids of Tara', 'The Creature from the Pit' and 'The Leisure Hive' for the show!).
HOWEVER
If you look at the right hand side of the picture, the character names, fight arranger, title music composer, director and mention of the Radiophonic workshop suggest that this has to be the one and only screening of 'The Daleks Master Plan Episode 7: The Feast Of Steven'
