Naaahh, obviously, I'm not after the cheapest one

At the end of the day, you get what you pay for, right?
"Spray Tek" seems like a professional company based in East London with plenty of experience, and serious portfolio -
http://www.spray-tek.co.uk/As I said, they quoted £800 (which I thought is too much), but I didn't go into details, so I'll send another email today and see what they are saying.
I'm definitely NOT paying £1000+ for a respray, lol