Fergie47:
5thwheel:
It’s rare for a SoM motor not to have its Home Depot designation and fleet number on each door,but I would guess the depot was Glasgow,I.e ND■■? as suggested by “Shugg”.
DavidThat 6 wheeler was based in Maddiston, along side a Scania, (either 6x2 or 6x4, I can’t remember) the Scania was driven by a relative, a nephew I think, of one of the Smiths…
My personal opinion of the “Big J”? admittedly on very short acquaintance with the dog, it was diabolical!! Uncomfortable, noisy,( worse than an Atki) difficult to get in and out and gutless, but I will say it had a poxy Gardner in it. Not a patch on an Atkinson or a Mandator, or even a Leyland Beaver!! 
my tin hat is firmly fixed. 
Regards Kev.