Question to the Department for Business, Energy and Industrial Strategy:

To ask the Secretary of State for Business, Energy and Industrial Strategy, what recent assessment his Department has made of the (a) health and (b) air quality impacts of nitrogen oxide emissions generated by the burning of hydrogen in (i) boilers and (ii) other domestic appliances.

Using 100% hydrogen for domestic heating is not yet an established technology. The Government, working with industry, is undertaking further work to assess the technical feasibility, costs, benefits and other impacts of using hydrogen, relative to other heat decarbonisation technologies. This will enable decisions in 2026 on the role of low carbon hydrogen in heating.