I'm in the USA and have no idea where Nottingham is. However, if you want a restoration quality job, check out Miracle Detail / Paul Dalton. He is well known in detailing circles as being top notch. I'm not sure where - but I know he is in the UK. You can see his work on You Tube. First class pro work.
You really want to make sure someone does this job correctly. Clear coat is THIN - maybe 3 mils. That's about as thick as a Post It Note. In all honesty, being a hardcore detail enthusiast, if you have the interest in learning - you could do this job yourself better than most people you could pay. As proper paint correction isn't super difficult - just time consuming. Time is something most "detailers" aren't willing to spend.
You could buy all the tools and products you need yourself for less than you could pay someone to do a quality job. Then your able to maintain your cars for life.