Morning Tony,
The PR suffix cars are quite well known about. There’s an article by Graham Arnold (Lotus PR legend) somewhere on here describing it. Apparently a change in Federal safety rules meant a batch of cars were stranded at the factory. Rather than waste them Lotus reworked them as domestic UK cars. Mine was also sold by Else motors. Whilst it’s not a full blown Else stage 5 car it had the single Weber carb with associated manifold, the 4 into 1 exhaust manifold and Spax shocks (probably stage 1).
Just another Lotus quirk!