The Architectural Heritage Fund
The Association of Preservation Trusts
Cadw: Welsh Historic Monuments
Council for British Archaeology
The Department for Culture, Media and Sport (DCMS)
Encyclopaedia Britannica Online
Environment & Heritage Service Northern Ireland
Federation of Family History Societies
Friends of Friendless Churches
The Historical Manuscripts Commission (ARCHON)
Images of EnglandThe Institute of Historic Building Conservation (IHBC)
List of English Record Offices and Archives on the Web
MOD (Ministry of Defence) Defence Estates
National Association of Almshouses
National Piers Society National Waterways Museum
The Royal Commission on Ancient and Historic Monuments in Scotland (RCAHMS)
Royal Commission on the Ancient & Historical Monuments of Wales (RCAHMW)
The Royal Institute of British Architects
The Royal Photographic Society
SAVE Britain's Heritage Society for the Protection of Ancient Buildings