GF's dads work car is a M plate Mondeo with Fords 951 immobilisation system fitted.
Its played up a few times latey and ford said replace the battery (its on a fob, not in the key) - problem goes away for a few weeks. Then the problem comes back, ford says replace the control - now the system wont disarm, even after the re-synchronisation procedure
So now the car wont disarm and wont start

How do I disarm the system so it never works agian but lets the car operate normally on the key ?
Best send any responces via pm, although I guess anyone that shouldnt know allready does
Cheers,
WD