Welcome to the site; the haven for lovers of fine old bikes.
As one who has had a frame recently resprayed via Roberts, I would politely advise that you don't go that route. I waited seven months for my DB to come back, and I only got it back that quickly because Brian kept his toe up the paint shops posterior. I know another forum member who has gone direct, and he has been waiting far longer than I did.
Argos in Bristol, Bob Jackson in Leeds (I think), Dave Yates in Lincolnshire and any number of other frame builders with in house spraying facilities (Roberts send their frames out), will be able to offer a high quality refinish.
Right, dire warning of impending doom over, please tell us more about the bike and post a lot more pictures... we luurve pictures
"Try not to punch any clowns"