Since I was already in Manchester, I thought I would drop in, un-announced to Williams.
The guy I needed to speak to wasn’t there (CRC had also tried unsuccessfully to ring him that day – they left me a message on my voicemail to tell me).
Long and short of it is I found someone (service manager) to recount my tail of woe to. I spent about 1 hour there, they agreed this is not typical when they looked up the warranty claims on the Jag system. They said they would get the person dealing with it to contact me on Monday. They did say they had no idea why my contact at Williams hasn’t sorted this already.