I've been using Homecert for all my electrical work at my flat in London for several years. They have done small jobs like this one ( fitting a new security light to the patio) and big ones like fitting a new consumer unity, and also tricky ones like investigating and sorting out a problematic power circuit. They are extremely reliable and efficient and the work is always of a very high quality. Communications with the office are, in addition, excellent. Their work is economically reasonable and properly costed. I cannot see myself bothering with any other London electricians as long as Homecert exists