The only observation on my old Motability car when it was handed back was that the tread depth on the tyres was really low.
The car had been into Kwik-Fit in various locations in the preceding months and all had declined the opportunity to replace them stating Motability wouldn’t approve it until they were literally illegal.
The tread depth of the tyres was red on the previous service so over the course of the following year and another 10K miles they really were not great.
I’d be a lot happier if Kwik-Fit when they decline work like this had to provide you with a document proving you’d been to see them and the work was declined. God forbid you’d ever have to try and explain such a situation to Plod if you were ever stopped for something – I’m sure they’ve heard all the ‘stories’ many times before.