Sorry, maybe you can go back to your garage and ask the mechanic exactly what the scanner read. You did pay for it so they shouldn't have a problem telling you what they found, not just that it's gonna cost you $$$$ (Sterling) to fix it.
If they say the "clock spring is bad" (or another part) we hopefully can tell you exactly what it is, where it is, and if he's ripping you off. Maybe tell you how to fix it yourself and save all kinds of quids.
Forgot to say WELCOME to the forum.