Strathaven, I do wonder at in the automotive world that even main dealerships may strip and repair engines or gearboxes on modern vehicles, which may have been the case for over a decade or so...?
As for digital system fault finding, I suspect unless it can be pointed to via plug in code readers, then again there may be little in the way of real expertise found at main dealers...?
There are a few vids out there on the failings of the German car industry`s ability to resolve software issues, which if true seem shocking...

I suspect it may be somewhat easier to find a good independent trader who specialises in the marque of whatever engine and or drive train is fitted to your Morgan to discuss servicing and repair...?
I type this thinking that there may be few options for Morgan skilled technicians in your area...
Perhaps worth a chat with any JockMog members who may run the same era Morgan...?