Today I was out for a RoSPA training ride and as I pulled into Choppers Cafe carpark a red tyre warning light came on the dash. After hitting the kill switch i could hear air escaping from the rear tyre. A flint had cut into the middle of the almost brand new Michelin Pilot 6. I deployed a previously unopened motorbike Dynaplug thing. It took three darts to plug the hole, I inflated with my Michelin rechargeable pump. I rode back home and 8 hours later the tyre looks fully inflate, I will check it again tomorrow.
Strangely this ride was setup as the other tutor also had a flint inflicted puncture last wee. He was carrying a Rema Tip Top tyre repair kit, which we were unable to fix his with and he had to wait for the AA who tried bacon strips, screw ins and finally plugged it with a mushroom From stop n go.