Thanks to Ross Eastgate for the following email:

“This little gem was discovered by David Taylor.

I recognised two faces, Frank Cross later RAE  and PJA Evans, later RASigs, who is the drummer in the jazz band.

That puts the film circa 1958.

David says we wuz robbed by not doing the DR training.  Hmmm…:

https://www.youtube.com/watch?v=u3Cupr-n6BY “

Just a little bit different from our era! Runs for about 18 minutes.