UK Parliamentarians
- Baroness BlackstoneLabourMember of the House of LordsPeer since 1987
- Lord BlackwaterConservativeMember of the House of LordsPeer since 2026
- Lord BlackwellConservativeMember of the House of LordsPeer since 1997
- Baroness Blackwood of North OxfordConservativeMember of the House of LordsPeer since 2019
- Baroness Blake of LeedsLabourMember of the House of LordsPeer since 2021
- Olivia BlakeLabourMP for Sheffield HallamMP since 2019
- Rachel BlakeLabourMP for Cities of London and WestminsterMP since 2024
- Lord BlencathraConservativeMember of the House of LordsPeer since 2011
- Baroness Bloomfield of Hinton WaldristConservativeMember of the House of LordsPeer since 2016
- Chris BlooreLabourMP for RedditchMP since 2024
- Baroness BlowerLabourMember of the House of LordsPeer since 2019
- Mrs Elsie BlundellLabourMP for Heywood and Middleton NorthMP since 2024
- Lord BlunkettLabourMember of the House of LordsPeer since 2015
- Lord BoatengLabourMember of the House of LordsPeer since 2010
- Kevin BonaviaLabourMP for StevenageMP since 2024
- Baroness Bonham-Carter of YarnburyLiberal DemocratMember of the House of LordsPeer since 2004
- Sarah BoolConservativeMP for South NorthamptonshireMP since 2024
- Lord BoothConservativeMember of the House of LordsPeer since 2024
- Lord Booth-SmithConservativeMember of the House of LordsPeer since 2024
- Lord BothamCrossbenchMember of the House of LordsPeer since 2020
- Jade BotterillLabourMP for Ossett and Denby DaleMP since 2024
- Baroness Bottomley of NettlestoneConservativeMember of the House of LordsPeer since 2005
- Lord Bourne of AberystwythConservativeMember of the House of LordsPeer since 2013
- Baroness BoustedLabourMember of the House of LordsPeer since 2025
- Andrew BowieConservativeMP for West Aberdeenshire and KincardineMP since 2017
- Baroness Bowles of BerkhamstedLiberal DemocratMember of the House of LordsPeer since 2015
- Lord BownessCrossbenchMember of the House of LordsPeer since 1996
- Baroness BoycottCrossbenchMember of the House of LordsPeer since 2018
- Lord Boyd of DuncansbyCrossbenchMember of the House of LordsPeer since 2006
- Sureena BrackenridgeLabourMP for Wolverhampton North EastMP since 2024
- Dame Karen BradleyConservativeMP for Staffordshire MoorlandsMP since 2010
- Lord BradleyLabourMember of the House of LordsPeer since 2006
Source: parliament.uk · 1,424 currently sitting · Open Government Licence v3.0