I had the opportunity to look through GIFFORD Entertainers in British
Film. It seems to be somewhat incomplete in that some films listings
do not show the performances (I assume this must be that the films were
not available to watch or documentation lacked the information).
Seems like an update to the book would be desirable.
The entry for PLAY UP THE BAND lists 2 songs PLAY UP THE BAND and
MUSIC HATH CHARMS. He totally misses the two items I find of most
interest in the film-the classic Stanley Holloway items I list.
. No list of performances in Wiki or IMDB, but
IMDB does have a note about THE GHOST OF HAMPTON COURT MAZE (maze
not muse my error). The Hampton Court Palace is a very interesting
historic site, and the maze is fun. They have a website....
Many music hall performances are available on YouTube.

Thomas.