Most of Lendrum’s work during the 60’s 70’s and into the 80’s came from the various foreign embassies in London. That business kept them very busy. By the late 80’s many embassies unfortunately switched to Mercedes vehicles.
When my dad bought his new 1970 impala from them I think it was about the same price as a XJ6. Lendrum fully loaded their cars, with Air conditioning being the only available option on the majority of their cars if you were prepared to wait on delivery. Their Cadillacs probably had it on.
Their lead salesman lived a couple of doors away and always bought home a GM product every day. Dad saw the impala and got a good deal on it. Fully loaded except for Air.