As a follow up to the OP above, I will update you with the saga to date!!! Took wheel with puncture to local Wilco where I was shown 2 punctures in the tyre, including one in the side wall, therefore new tyre required, brilliant :D . I also took the opportunity to get the front two tyres reseated/sealed as both have been losing about 1 psi per day recently. 45 minutes and