Respray and Chasis Prep recommendations?

I am considering biting the bullet and going for a complete respray of my mk2 golf, spruce up the engine bay and re-underseal the underside along with some powder-coating of various bits.

Does anyone have any recommended places I should use, preferably in the South East and not to far from the Hertfordshire area but for the right job (and price!) I am willing to travel.

Thanks in advance.