Opella Cistern Bottom Entry Filling Valve Adjustable Arm 1/2" with Ball Float
Range from the cheapest replacement of a toilet float valve £40 (A&G Plumbing and Heating Services based in E15) to the dearest replacement of a float valve £80 (Ian Shillingford based in E10).
Comparing plumbers estimates for replacing a toilet float valve in the cistern tank 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 to replace a toilet float valve in Leyton by posting a job with HaMuch and we will send it to plumbers in Leyton.

"Replace float valve in toilet cistern"
E10