I really need a trusted plumber urgently in S. London to look at or replace the boiler for my elderly dad. Sadly he has had one cowboy after another (including British Gas) charging him a fortune to look at it but do nothing and two who 'pretended' to do a power flush and others who made outrageous quotes for new boilers. I am so upset. Can a fellow mumsnet user recommend me a person you have used and sincerely trust to be honest and competent? Thank you very much in advance for your help.