/ Sheffield sort of area. Mansfield is not too far ether. A good mobile one would be handy.Last fitter I used was a mobile one and he was a real muppet
Found out he had some sort of allergy to solder and just twisted the wires together . He did one for me and one for my brother . My brother slammed his car door and the alarm fell into his foot well . The useless fitter had just wedged it behind the dash . Must have been allergic to screws too 
Chhers
Nick