Launched as a GOV.UK service page in July 2022 is a new heat pump check service, which has been created to: provide the UK public with information about heat pumps; and offer tailored information about the potential options for their home. In collaboration with technical experts from Energy Systems Catapult (ESC), OCC has ensured the site meets the GOV.UK Service Standard, by following the GOV.UK Service Manual, and using the GOV.UK Design System. These standards and systems are set out and administered by the Government Digital Service (GDS). Any site with a GOV.UK domain must meet these requirements. Below we explore how we achieved this on this project.