Thanks for advice, they have been back out to it today, still struggling to do it, going to try with some other info gained tomorrow apparently. I have searched everywhere around the work area, never been so tidy, even been through vac bag !!!
They have fixed the key, remote central locking working again, just struggling to imobilise the immobiliser so to speak. When I say Garage, I mean specialist Car key people. They have quoted me £115 to do what they can't do at the moment, £25.00 for repairing the fob, not been paid yet and like you say to be paid when fixed.
Changing the ECU etc is looking likely, so may take you up on that offer, what kind of money would you be looking for ?