It wouldn't hold up in court, not a chance
So how come, all the people I dealt with at work, for tyres less than 1.6mm (using the exact same measuring process, and type approved device) went on to be convicted / lost trials?
I measured these tyre treads applying the same process, across the entire width at multiple points around the circumference of the tyres.
These days I am out of uniform / in the Detective arena on more complex cases - but I remember enough about my days on response and traffic to know how to determine (to a court standard) whether a tyre is below, or above the limit of 1.6mm. I’ve never had a court reject my evidence around tyres.
As I said - I don’t disagree with you, in that, I wasn’t comfortable with her presenting it with tyres that were close. But, I wasn’t given time to repair it before the test - and - fact is, the tyres were not remotely illegal, and categorically don’t constitute a “dangerous” MOT failure as they said …..