I never saw a Scammell with the tracks but, yes, I can well believe they would be excellant in mud - once fitted.
When I was still at Ashchurch, I remember getting a Champ out of storage in fact it may have been a Gipsy. Rare either way by the mid-70's.
We had a Diamond 'T' when I was at Recklinhousen(?). Went fast with no load but 'gutless wonder' when pulling anything at all. We had an AEC 6x6 Militant artic unit which I believe was modified as a towing recker. That seemed rare being an artic unit.
Those pictures are so good - bring back loads of memories. Thank you for posting them:kiss:. I did my 'C' class partly on a D6 but wanted to play on a D8. None available then at Ashchurch:embarrassed: