I have really mixed views about Richmond MG Botley but mostly I think they're not very good.
My MG4 has been back to them for the same fault (USB Disk Identification Error & parasitic drain on the 12v battery) on 4 occasions now and it's only 18 months old. I have been distinctly underwhelmed on each occasion. After each "investigation" they make a point of telling you the car "shows no faults", when they clearly know that the RAC, AA or I will have had to disconnect the 12 V battery to resolve the issue, which in turn clears all the error codes. They make you feel like you're making it up!
I took it in again today as have recently had several repeats of the problem and all they had on their service sheet was "radio draining battery" .... well, that seems like a statement of the bloody obvious!

I tried to explain what was actually happening to the service advisor and that it had been in several times before with the same issue, but frankly she gave the impression she couldn't care less. Unlike some of her colleagues, she didn't make any additional notes re: the problem on the worksheet as I was explaining the history and my theory for the cause of the issue.
I got home frustrated as I was hoping another software update
might solve the problem but she was distinctly non-committal on this point. So I called back (they answered on the 6th attempt over 2 hours!) and I asked for re-assurance they would upgrade if a patch was available. All she said was they would "if it was appropriate". She then said - and here's the irony - that the Tech had just been out to speak to her as he didn't understand what the issue was from "radio draining battery".... and that obviously the radio will stop working if listening to a local radio station if driving outside the broadcast area (well, duh!!!) - completely missing the point! The Tech would have understood the issue if she could've been bothered to LISTEN to me and make a few notes. Anyway, I wouldn't recommend this dealership to anyone, but don't have many other options.....