An extension to the use of PAS 2035:2019 applies to SHDF Wave 2.1, 2.2 and HUG2 projects but does not apply to ECO4 and GBIS projects.
The ability to use PAS 2035:2019 Retrofit Assessments in PAS 2035:2023 projects, is also subject to an agreed conversion process.
All WH:SHF and WH:LG projects will have to adhere to PAS 2035:2023.
Further information at https://www.trustmark.org.uk/business/information-guidance/pas-20352019-pas-203020352023/retrofit-portal