Wayne from Bright Spark Electrical came, firstly, to see what the problem was with an outside power box that kept tripping out and finally wouldn't reset. He identified the problem and ordered a new RCD box, which he subsequently successfully fitted and tested. Very thorough, reliable and friendly. I would certainly use him again and would recommend him to others. His phone number is now in my smartphone as my 'go to' electrician!
Response : Thankyou very much for your kind words, it's very much appreciated. Wayne.