[zb]
anorak:DEANB:
Heres another one Ken.A single-wheel 6x4 tractor, carrying containers. It looks like one of those vehicles intended to meet the proposed 44-on-five legislation, in 1971. If it is, then it would need at least 264bhp, to meet the 6bhp/ton requirement, which came into being around the same time. No 8 cylinder Gardner there, then.
Here’s part of your answer: the ■■■■■■■ might, of course, have been a 220, a 250 or an NTC 290 and if the latter you’re home; and the big radiator suggests that that may well be the case! I’ll investigate further 
. Robert
