Can anyone recommended a good specialist they've had good work done with in the Essex / Suffolk area who could work on E28 M5? Losing the faith with the main dealers!!
I'd second PMW in Chelmsford, have complete faith in them. However your M5 may be more suited to the talents of Phil Crouch, Phil is near Chorley Wood just off J18 of the M25 (from memory).
I would get the car over to David Olias who is a huge E 26 M5 owner, serial repairer and run his own garage, Classic MD Autos who are in Brent Eligh on the Suffolk / Essex border.