GFS was recommended to me by a friend, I would definitely use Glen again. The fitting of a new bathroom light went wrong because the wiring in the house was old and faulty resulting in all the main ceiling lights upstairs and downstairs no longer working.
Glen realized there was more than one fault and corrected all of them within a couple of hours, including replacing a couple of light fittings and switches and rewiring part of the main fusebox. Punctual and friendly service.