albion1938:
Whatever it is, it’s a Homalloy cab. Variations of it used on all sorts of motors including a few BMCs Pete.
Bernard
Yes Bernard, Southern Gas had a few BMC’s with that cab powered by the 3.4 four cylinder engine. I re-engined a couple with Gold Seal units. Oh and I said it was a Leyland before Carryfast, even posted a pic with the same grille badge, but he can keep the cigar as I value my lungs too much! 
Pete.