Hi thank you for your suggestions all.
I have just got back from holidays and the car is going in to get some diagnostics carried out (no cost) as having a second key programmed at Greypaul Maserati in a couple of weeks. I will use this to get more info whilst the car is with them and then go from there.
No doubt they will suggest I need a new chassis, wheels, ECUs etc. etc.!! (Unless anyone has good experience from the usual Maserati main dealers?)