Errol sorted my FRP map quickly, efficiently and cheaply. He's in Birmingham, Wolverhampton way from memory.
I'm no expert but I don't think 'normal' OBD2 hardware can remap the Puma. I've done a few other cars where you get the map, send it away for tweaking then upload the revised map to your ECU but I don't think it's possible on Puma. AFAIK only one or two ECUs (MUFF? TAPE?) are capable of running the FRP map. Slight complications with early v late instrument panels and mechanical v electronic speedo.
Errol took my old ECU off and swapped it for another that he'd previously tweaked with the FRP map. There is also some wire swapping needed with temp guage I think.