That was the Mk 1a a it before my time
We used to get 38mph out of the Mk 3 fully loaded with a chieftan or chally
Giving us a total all up wieght of around 100 ton
Many a time I have fell out of one of them drunk I dont mean out of the passenger side

I am sure bill can confirm that

most of us would have a bottle or a crate in the cab