I would avoid this company as they are overpriced and not especially efficient. I had an electrical job that involved replacing the fusebox as a fuse kept tripping. The initial call out was dealt with fairly quickly (i. E. an electrician came out the next day) and but the charge was a whopping £124, and this was after a weird 'negotiation' with them (I think their charges are based on how busy they are - this was a 'not busy' call out charge).
After this initial 'appraisal' by an electrician, the job to supply and fit a new fusebox needed a further £700-800 (final cost would depend on how long it would take, as they quote per half hour).
From initial appraisal to pricing for the new fusebox and quoting for the job to fit the fusebox, it took 3 and a half weeks, one 'lost' (defected) engineer and about 6 slightly frustrating phone calls. Not what I would describe as high-end efficiency.
This - to supply and fit a fusebox. I'm afraid I did not, and could not, justify the expense and did not go ahead with it. I went to another company and got the job re-appraised all over again and actually done - all in under a week - for £480 all in. This was in the autumn of 2017; I have all the required certification and have not had any problems since.
The only good thing about this company is the politeness of the people who answer your calls. They are all sweetness and courtesy, and the one star here is all theirs.
My advice would be to shop around if you can. Even if you are desperate, I wouldn't go with anyone charging a call out over a hundred pounds - doesn't bode well...