yes got to fess up to that one, I loved that little car as well, was a MG 25 (well when BMW had a hand in the Rover firm)
went like a dream BMW spec diesel engine wow, handled in accordance
Managed to fill it up from about half tank with petrol (talking to a mate while filling up ??), went back down into Berwick (1/2 a mile), did a bit of shopping then came to go home was very difficult to start (did the penny drop noooooo), going home it was fine up to about 50 then seemed a bit slugish (did the penny drop noooooooooooooo), took the shopping in, sorted out the receipts including the one from Morrisons petrol -- PETROL !!!.
Drained the tank, put in some diesel, down to Wooler and filled up, it never showed any ill effect at all lucky eh, well karma maybe but a couple of years later I ran through a very slightly flooded road (was not even up to my shoe laces holes) and it sucked in a mouthfull of water and died, insurance wrote it off - damn.
it had a belly pan, must have splashed up on to that and sucked in the H2O, why do they put the intake down there never could understand that