UK Parliamentarians
- Lee BarronLabourMP for Corby and East NorthamptonshireMP since 2024
- Sir Kevin BarronLabourMP for Rother ValleyMP since 1983
- Mr Alex Barros-CurtisLabourMP for Cardiff WestMP since 2024
- Lord BarrowCrossbenchMember of the House of LordsPeer since 2025
- Lord BarwellConservativeMember of the House of LordsPeer since 2019
- Lord BasingNon-affiliatedMember of the House of LordsPeer since 1983
- Lord BasnettLabourMember of the House of LordsPeer since 1987
- Lord Bassam of BrightonLabourMember of the House of LordsPeer since 1997
- Alfred BatesLabourMP for Bebington and Ellesmere PortMP since 1974
- Lord BatesConservativeMember of the House of LordsPeer since 2008
- The Lord Bishop of Bath and WellsBishopsMember of the House of LordsPeer since 1997
- The Lord Bishop of Bath and WellsBishopsMember of the House of LordsPeer since 1981
- The Lord Bishop of Bath and WellsBishopsMember of the House of LordsPeer since 2008
- Marquess of BathOtherMember of the House of LordsPeer since 1946
- The Marquess of BathLiberal DemocratMember of the House of LordsPeer since 1992
- Earl of BathurstConservativeMember of the House of LordsPeer since 1943
- Spencer BatisteConservativeMP for ElmetMP since 1983
- Baroness BattersCrossbenchMember of the House of LordsPeer since 2024
- John BattleLabourMP for Leeds WestMP since 1987
- Lord BauerConservativeMember of the House of LordsPeer since 1983
- Johanna BaxterLabourMP for Paisley and Renfrewshire SouthMP since 2024
- Sir Hugh BayleyLabourMP for York CentralMP since 1992
- Simon BaynesConservativeMP for Clwyd SouthMP since 2019
- Danny BealesLabourMP for Uxbridge and South RuislipMP since 2024
- Lord BeamishLabourMember of the House of LordsPeer since 2024
- Mr Nigel BeardLabourMP for Bexleyheath and CrayfordMP since 1997
- Viscount BearstedConservativeMember of the House of LordsPeer since 1986
- Viscount BearstedConservativeMember of the House of LordsPeer since 1996
- Earl of BeattyNon-affiliatedMember of the House of LordsPeer since 1972
- The Duke of BeaufortConservativeMember of the House of LordsPeer since 1984
- Lord Beaumont of WhitleyGreen PartyMember of the House of LordsPeer since 1967
- Sir Anthony Beaumont-DarkConservativeMP for Birmingham, Selly OakMP since 1979
Source: parliament.uk · 1,424 currently sitting · Open Government Licence v3.0