Thank you all

I'm starting to wonder how much of a setup the bike shop did. I checked the tyre pressures this evening, as the rear one felt a bit low at the shop but the guy said that everything had been checked. The rear pressure was half what it should have been. I'll check again in the morning in case there's a slow puncture. And the front wheel doesn't rotate entirely smoothly, it's catching very slightly, and stops dead after a few spins. I know it was a cheaper bike and a shop floor model, but even so I'd still expect the tyre pressure to be right. I'll ask them to check it over tomorrow. It wasn't my regular bike shop, needless to say.