The HSE cannot force a homeowner occupier to undertake an annual service or inspection of their gas boiler although they "strongly reccomend" it is undertaken. Should an incident occur in a domestic property and it was found to be due to a fault in the installation of the boiler or design/manufacturer fault with the boiler itself it would then become HSE matter and should the HSE require access to investigate they have legal authority to do so. If the resident refuses the HSE would probably contact police to assist or get a court order to obtain access. "1. Inspectors appointed by an enforcing authority under section 19 HSWA have extensive powers to carry into effect any of the relevant statutory provisions.1 The powers set out in sections 20(2) and 25 HSWA include powers to: Enter any premises which inspectors think it necessary to enter for the purposes of enforcing HSWA and the relevant statutory provisions. They may only enter at a ‘reasonable time’, unless they think there is a situation which may be dangerous.2 If they have reasonable cause to expect serious obstruction, they may take a police officer;;3 "