This P5B saloon has just come up on Ebay. It's quoted as registerd 11/06/76 and has a "P" registration. I wonder if this could be genuine - the car is black and has bucket rear seats, so could it be one of the batch that were put aside for government use after production ended?
Chris
http://www.ebay.co.uk/itm/1971-ROVE...2394335?pt=Automobiles_UK&hash=item4602a9d15f
Chris
http://www.ebay.co.uk/itm/1971-ROVE...2394335?pt=Automobiles_UK&hash=item4602a9d15f