Triple S- http://www.triple-s.co.uk/
They can arrange pick up and delivery as well........did indeed do a good job- I had to take some of the coating off to get the rear shock mounted, and it wasn't that easy- good tough coating.
Cost was £50 plus vat for satin dark grey, mebbe not the cheapest, but far less hassle and much better than rattle cans!
Just outside newcastle and very good. Iv had several frames done there and they have all been excellent. They do a large variety of colours and finishes. Prices for a flat colour (blasted then coated) is about £30, more tarty finishes push the price to £60.