Looking for a body work repairer

If your bodywork is some form of ABS or fibreglass you could try a boat repair yard. North of England is not much of a clue as to whether you might be near such a facility. 

Alternatively, check out caravan workshops.

Crosskeys in Leyland Lancashire are good 

Crossleys in Leyland 

If your body is aluminium you could do as many of us do/did and cover the hole with a reflector sealed with mastic 

Thank you.

As to location, we're near York but if it means I can get it fixed then I'll travel. One repairer said they're booked up 'till April !