Merry xmas CJ,
That sort of recording is close to priceless, My paternal Great Uncle and Great grandfather were both drivers, GGF Retired when it was still the Caledonian Railway (he died in 1919), GU started on the Caledonian, then the LMS and retired when it was BR (died 1968). I wish there was some material but apart from a picture and account of a run from Stirling to Oban in a book there is nothing - and some very vague memories of mine.
Protect it.
Gavin
Linslade
Bedfordshire
UK
Garratt Locomotives
[
www.beyergarrattlocos.co.uk]