Thought I'd post these two pics for you which come courtesy of my good friend Martin Dawson who used to drive this particular truck.
The first pic shows the truck loaded ready for a trip upto Salford, Martin tells me he did three such trips in the same day.
The second pic shows the truck outside The John 'O'Groats hotel on Wednesday 14/05/1980 he had just taken a similar delivery to the nuclear plant up at Dounray and he decided to take a slight de-tour on the way back

This particular truck was powered by the Leyland TL12 engine and not the Rolls Royce or even less common in Marathons Cummins NT.
Jeremy