South Glos; I've used JB Motors in the past, to have a 3/4 panel pulled out and resprayed, including a tricky colour match. For how much it needed to cost it wasn't too bad.
Depending where in Glos you are, if you are close to the Oxfordshire border, I'd recommend these guys in Witney. https://www.kcautocolours.co.uk/
Their painter is a forum member, but does not post much, but (when allowed) organises an evening meet through the summer. His work is good, although probably not cheap. If you want a good paint job, it costs. If you're happy with "looks adequate from across the street", probably any paintshop will do.