Thanks all. I’ve not got a lot of driving miles to do so not a huge risk. To be fair the instructions on the tire weld can says the tyre can be repaired – it was the instructions on the Ford OEM bottle of gunk that said if you use the stuff the tyre cannot be re-used. I’ll grab a can and a compressor this morning.
I know I should get a spare wheel and jack but then you’re into the issue of do you get a space saver that’s limited to 30mph or something and is really only a get you home/to the garage measure, or a full size wheel so if you do need to use it you don’t have to faff around getting the removed wheel repaired immediately. A full size spare will take up a lot of room in the back, where those long journeys when I would want to take the wheel with me are just the rare occasions I am actually able to completely ram the SMax to the brim, so there would be no room. Hopefully between my OEM compressor and bottle of gunk, a can of tyre weld and a compressor i’ll be covered.