| Title | Category | Subcategory | Records |
|---|---|---|---|
| Britain, Directories & Almanacs | Newspapers, Directories & Social History | Directories & Almanacs | 245,180 |
| Britain, Early Emigration To Barbados | Travel & Migration | Migration | 20,560 |
| Britain, Early Emigration To Barbados Browse | Travel & Migration | Migration | 1,173 |
| Britain, Enemy Aliens and Internees, First and Second World Wars | Armed Forces & Conflict | Government | 139,548 |
| Britain, Enemy Aliens and Internees, First and Second World Wars Browse | Armed Forces & Conflict | Government | 187,255 |
| Britain, Histories & Reference Guides | Newspapers, Directories & Social History | Social History | 27,308 |
| Britain, Knights Of The Realm & Commonwealth Index | Newspapers, Directories & Social History | Medal Rolls and Honours | 36,494 |
| Britain, Marriage Licences Browse | Life Events (BMDs) | Civil Marriage & Divorce | 10,309 |
| Britain, Merchant Seamen, 1835-1857 | Education & Work | Merchant Navy & Maritime | 1,915,010 |
| Britain, Merchant Seamen, 1918-1941 | Education & Work | Merchant Navy & Maritime | 1,200,193 |
| Britain, Missing Beneficiaries and Unclaimed Estates 1910 | Life Events (BMDs) | Wills & Probate | 529 |
| Britain, Newgate Prison Calendar Vols 1 & 2, 1780-1841 | Institutions & Organisations | Directories & Almanacs | 1,357 |
| Britain, Registers Of Licences To Pass Beyond The Seas 1573-1677 | Travel & Migration | Migration | 27,758 |
| Britain, Registers Of Licences To Pass Beyond The Seas 1573-1677 Browse | Travel & Migration | Migration | 1,698 |
| Britain, Royal African Company 1694-1743 | Travel & Migration | Migration | 55,954 |
| Britain, Royal African Company 1694-1743 Browse | Travel & Migration | Migration | 1,493 |
| Britain, Russian Orthodox Church In London Browse | Life Events (BMDs) | Parish Registers | 13,218 |
| Britain, School and University Register Books | Education & Work | Schools & Education | 25,814 |
| Britain, The National Guard In The Great War 1914-1918 | Armed Forces & Conflict | First World War | 316 |
| Britain, Trade Union Members, Service & Casualties 1914-1918 | Armed Forces & Conflict | First World War | 61,058 |