Thanks for the advice.
I was in touch with Dreadnought garage before, but they are no longer MG/ROVER dealers, and I wasn't sure they were still clued up on our cars. For instance, they had never done a fan gold resistor replacement...
There's a good chance I will be going to St. Andrews soon, so a stretch up to Dundee is not so far. I'll let you know if I will be coming. Besides, my car will relish a longer run! I did take her down all the way to Newcastle to see Brian, so Dundee will be a dawdle!