The long awaited update to the Building Regulations for England has just been released.

Changes to building regulations will help UK deliver net zero
New homes will have to produce around 30% less CO2
Important step for industry ahead of Future Homes and Buildings Standard in 2025

Referred to as the 2021 edition they are actually the The Building Regulations 2010. These regulations take effect on 15 June 2022 in England

The approved documents are available on the government website at https://www.gov.uk/government/publications/conservation-of-fuel-and-power-approved-document-l