Another f'in puncture

[Grahamm]

a lot of places won't repair Z rated tyres something to do with the speed ? although on the road you won't be going over 70 mph?

I have Puncturesafe (Ultraseal) in my tyres although, thank the gods, I've never needed it to work.

The "Can't replace Z-type tyres" bit does strike me as nonense. Yes, they're rated at up to 150mph and, yes, it may be unsafe to repair them if you're going to do 150mph, but unless you're going on a track day, you're never going to be doing that sort of speed.