Your dealer is lying ... SC is Service Campaign so is to be done when the car is, well, serviced! ? If your ACC functionality hasn't changed then they absolutely, 100% have not installed SCUK001.
Did they actually plug the car into the laptop to check? If they only checked via VRM/VIN then this sometimes misses updates that are actually listed - the car has to be plugged in.
This was very poor by your dealer/service agent ... especially for that price! ? I would be raising a formal complaint with the dealer principal.
Your point about the MG assist benefit of servicing in another thread was well-made.
Hence my comment that I feel that is the reason for having the service done. The car doesn't have an engine and was bought from the dealership a few months ago (when it was checked over, as it was a couple of months later with the door handle investigation).
SCUK001
Waylands called me back (promptly) to say that the car is reported to have had SCUK001 applied 1 year ago and there were no further updates due, so it was not connected for any software checks/updates.
So you were right that dealers don't check the software as a matter of course but rather go by what is recorded on the MG system for that car. I guess it makes sense for MG to keep a record of which car has what software so they know what needs updates/recalls. But it would mean that any errors on the MG system aren't going to be caught.
I bought the car from a different branch of the dealership so it isn't like it would have been the same technician.
Anyway, the good news is I was told I can bring the car in any time to get it hooked up to the laptop. So we can see what is what at that point.
I'll see when I get a chance to pop in (it isn't that convenient to get there from home) and whether it will be possible before we go on holiday in July.
Washer fluid
Also on the washer fluid apparently MG requires this to be drained and refilled during the service to make sure it is fresh. So if I
had topped it up it would have been emptied anyway.
They offered to refund but I admitted it was possibly part of the price I was quoted and I just didn't realise it was included as a separate item until I saw the receipt.