Took mine in today to get R46 installed (it went in a few weeks ago for the same thing but they “couldn’t do it” at the time).
Sat there for 90 mins, was told all done. Got back in the car - still R30. Back to the service guy to ask why, he tried to tell me that the car ‘needs to do a sleep cycle to apply the update’
I called him out on this, he said he wasn’t a technician, neither am I but I know bull when I hear it.
Long story short, don’t bother going to Acorn MG in Crewe, they are less than useless.