| B |
| Bach Concordance and Cyclopaedia |
| Barque, Crater, Face, Gargoyle, and West House Presses |
| Bartolomé Papers |
| Dave Bathe Collection of Derbyshire Traditional Dance and Drama |
| Batley, Morley and Ossett Labour Party Manuscripts |
| The Oliver Beckerlegge Bible Collection |
| John Beckett Collection |
| Sir Thomas Beecham Music Library |
| Beet Lantern Slide Collection |
| Howard Biggs Papers |
| Birks Drawings |
| Blackshirt Collection |
| Blackshirts in Kingston Project |
| Madeleine Blaess Documents |
| Richard Blakeborough and John Fairfax-Blakeborough Yorkshire Folklore Collection |
| Blunkett Archives |
| Bonett Manuscripts |
| Boorstin Collection |
| Botany Wall Charts Collection |
| Bownas Recordings |
| Bradley Documents |
| Britain and the Refugee Crisis Collection |
| British Coke Research Association Archive |
| British Orienteering Federation Archive |
| British Union Collection |
| Rudmose Brown Collection |
| Buchan Theatre Programmes |
| Geoffrey Bullough Collection |
| Burke-Haviland Family Documents |
| Burley Manuscripts |