All home inspector certification schemes are operated by private companies, so enquiries on their current membership would be more appropriately addressed to individual schemes.
The contact details for the three schemes are:
Telephone: 01923 664947
Telephone: 0870 333 1600
(iii) Surveyors and Valuers Association
Telephone: 0870 837 6500
Accreditation schemes for domestic energy assessors are in the process of being approved by the Secretary of State, and will receive formal approval shortly. As no approval has yet been made details cannot be provided.