Great info Graham! Perhaps, with his permission, you can post an e-mail where he can be reached, so that members outside of GB can ask him technical questions. Yes, I do agree that many BMW main dealers here in the U.S. tend to call us old technology. Rather than properly diagnosing the problem, they go by standard porcedures, which in turn can cost thousands of dollars or pounds along the way. It is quite rare that you do find an expert who actually cares grately about the 8 series.
Post to all: If there are any exceptional BMW mechanics in your area, please post. This may save us all and have the 8 live 4ever!
Regards,
John P.
P.S. Graham, what part of GB are you from? I used to work at the BMW plant in Oxford.