Brake discs below minimum thickness?

[Deleted User]

I would expect a standard micrometer without adapter to be hit and miss especially with a lip. Then there is the runout and thickness variation.

https://www.gov.uk/guidance/mot-inspection-manual-for-private-passenger-and-light-commercial-vehicles/1-brakes#section-1-1-14

My car is service same time as MOT, I expect a crossover of inspection and the last change was required whether MOT picked it up or not.