Please note: only repositories recognised as such by ARCHON are listed here.
Some collections still held by organisations will therefore not be included.
| Action for Blind People's archives | (1 collection) |
| Action for Victims of Medical Accidents | (1 collection) |
| Affinity | (1 collection) |
| Air League | (1 collection) |
| Archives and Special Collections, The Mitchell Library | (3 collections) |
| Association for the Conservation of Energy | (1 collection) |
| Barnett Research Centre | (1 collection) |
| BBC Written Archives Centre | (1 collection) |
| Bedfordshire and Luton Archives and Records Service | (1 collection) |
| Bernie Grant Archive | (4 collections) |
| Birmingham City Archives | (2 collections) |
| Birmingham University Information Services, Orchard Learning Resources Centre | (3 collections) |
| Birmingham University Information Services, Orchard Learning Resources Centre, Selly Oak Campus | (1 collection) |
| Birmingham University Information Services, Special Collections Department | (12 collections) |
| Bishopsgate Institute | (6 collections) |
| Bolton Archive and Local Studies Service | (1 collection) |
| Borthwick Institute for Archives
Borthwick Institute for Archives | (1 collection) |
| Borthwick Institute for Archives | (5 collections) |
| Boys' Brigade | (1 collection) |
| Bradford University: JB Priestley Library | (5 collections) |
| Bristol Record Office | (3 collections) |
| Bristol University Information Services: Special Collections | (4 collections) |
| British and Foreign School Society Archive Centre | (1 collection) |
| British Council for Disabled People | (1 collection) |
| British Ecological Society | (1 collection) |
| British Empire and Commonwealth Museum | (1 collection) |
| British Film Institute, Special Collections | (1 collection) |
| British Heart Foundation | (1 collection) |
| British Housewives League | (1 collection) |
| British Library, Asia, Pacific and Africa Collections | (1 collection) |
| British Library, Asia, Pacific and Africa Collections (previously Oriental and India Office Library) | (2 collections) |
| British Library, Manuscript Collections | (2 collections) |
| British Library, Sound Archive | (1 collection) |
| British Pensioners and Trade Union Action Association | (1 collection) |
| British Red Cross Museum and Archives | (1 collection) |
| British Trust for Conservation Volunteers | (1 collection) |
| British-German Association | (1 collection) |
| Brunel University Library | (1 collection) |
| Cambridge University Library, Department of Manuscripts and University Archives | (5 collections) |
| Cambridge University Library: British and Foreign Bible Society Library | (1 collection) |
| Cambridge University Library: Royal Commonwealth Society Library | (2 collections) |
| Cambridge University: Churchill Archives Centre | (3 collections) |
| Canning House Library | (1 collection) |
| Carmarthenshire Archive Service | (1 collection) |
| Catholic Truth Society | (1 collection) |
| Catholic Union of Great Britain | (1 collection) |
| Central Zionist Archives | (2 collections) |
| Centre for Kentish Studies | (1 collection) |
| Cheshire and Chester Archives and Local Studies | (1 collection) |
| Children's Society Records and Archive Centre | (1 collection) |
| Christian Ecology Link (CEL) | (1 collection) |
| Church of England Record Centre | (11 collections) |
| Church Society | (1 collection) |
| City of Westminster Archives Centre | (2 collections) |
| Civic Trust | (1 collection) |
| Co-operative Party | (1 collection) |
| Collections & Archives, St Dunstan's | (1 collection) |
| Commonweal Collection | (1 collection) |
| Community Service Volunteers | (1 collection) |
| Compassion in World Farming | (1 collection) |
| Confederation of Indian Organisations (UK) | (1 collection) |
| Conservative Christian Fellowship | (1 collection) |
| Cornwall Record Office | (1 collection) |
| Council for Awards in Children's Care and Education | (1 collection) |
| Council for the Advancement of Arab-British Understanding | (1 collection) |
| Dango has been unable to locate the records of the Natural Law Party | (1 collection) |
| DayCare Trust | (1 collection) |
| Doncaster Archives Department | (1 collection) |
| Dorset History Centre | (1 collection) |
| Dowlais Library | (1 collection) |
| Durham University Library, Archives and Special Collections: Palace Green Section | (1 collection) |
| East Sussex Record Office | (1 collection) |
| Edinburgh University: New College Library | (1 collection) |
| Electoral Reform Society of Great Britain and Ireland | (1 collection) |
| Employment Policy Institute | (1 collection) |
| English-Speaking Union of the Commonwealth | (1 collection) |
| Essex University Library | (6 collections) |
| European Movement | (1 collection) |
