[Dom]

Incredibly, while out at the car touching up yet more stonechips, I've just discovered a bolt stuck in the base of a tyre - see attached pic. Haven't had a puncture in years and 2 weeks after buying my first car with RFTs I get a bolt stuck in one of them.
I know nothing about RFTs. What's the procedure? Will I be able to get it repaired with a plug tomorrow ( Monday) when the garages reopen? Can I drive on it today? Am I likely to be hit with a bill for €300 for a new tyre? If so, can I drive on this until the new one arrives? I started to unscrew this bolt and the air started to come out, so I screwed it back in.
Any advice willl be much appreciated.