Amery Motorsport in Congleton, I wouldn't touch SW because when they did Robs Megane they cut wires they weren't supposed to cut, overspray everywhere and also took about a month to do it because they book that much in they do a bit there and a bit here.
Amery MS had my car for 3 days and the quality of work is fantastic, they re-sealed the underneath and even painted the mount's inside the car the same colour as the body. My cage was from Mark Fish and the cost of fitting by Amery was £500, sounds a lot but when its a proper job I couldn't careless.