Contact listed on GOV.UK
This number is listed on GOV.UK under “Find Ways to Save Energy in Your Home”, on the page “Find ways to save energy in your home”.
Hours given: “Monday to Friday, 8am to 6pm (except bank holidays) Saturday, 9am to 12pm”
Source: GOV.UK page (opens in a new tab), last updated on GOV.UK on 29 July 2022.