cav551:
It depends on whether the load index (ply rating) for single use marked is 152 -7100kg or 154 - 7500kg. Check your Plating Certificate, which is why the garage doing your MOT preparation asks for it. Without them having it to check what the tyres are plated for you are risking a failure or sometimes a refusal to test. The ‘plate’ in the cab does not have this information about tyres.
Yes, I have found this out.
But, maybe I’m wrong, but this is not generally known is it?
You live and learn eh