No reputable tuners up there that have done many twingos, just go RS tuning Leeds atleast then the mapper knows what he's doing as he has done many before
go to extreme motorsport in whitburn. cannot put a good enough recommendation in for their work, and if you ever attend knockhill trackdays and see the two evo's (black and dark silver ones that hit 600 and 750 or so brake) that outpace everything on the track days then they are the boys who own extreme motorsports. they are fantastic with custom evo ecu installs from scratch so i think they'd be okay on doing a twingo! they've just moved premises and they're changig the website over. don't worry, it was a well ran website before i promise.