HE Archives Hub - Descriptions of archives in UK universities and colleges
National Archives Catalogue - includes NRA, the National Register of Archives, ARCHON, directory of archives, A2A Access to Archives, MDR, Manorial documents register
Heritage Gateway (IHBC) - combined search of 49 resources including the National Heritage List for England, Pastscape, the National Trust Historic Buildings Sites and Monuments Record, Images of England and Viewfinder
National Heritage List for England (English Heritage) - search for listed buildings, scheduled monuments, protected wreck sites, registered parks and gardens, registered battlefields