Cheers both, will investigate further. It was mentioned (and uploaded) on the Chiff and Fipple forum, but the links are long dead. Speaking of which, here's Kenneth Cranham's 2006 radio special on the Barrack Room Ballads: https://www.sendspace.com/file/xgvxk3

Radio Times write-up here: http://genome.ch.bbc.co.uk/d42fe7b3e5bd4792b06e6e86e4909a2e