Range from the cheapest Fix a leak £252 (A1 Boiler Repair London based in EC2A) to the dearest Fix a leak £400 (PlumbWise Plumbing Services Limited based in N1).
Comparing plumbers estimates for Fix a leak gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes for fixing a leak in your home by posting your job to plumbers in City Of London.