I would highly recommend John Bergin, you can see his feedback on Checkatrade, he is fully qualified and a very nice bloke. http://www.checkatrade.com/JohnBerginPlumbingHeating/ He has done several jobs at my house in SE21 and is polite, efficient and punctual - plus his work is top class and he is not expensive. If you want to confirm this with a verbal reference, send me an email.