UK Parliamentarians
- Matt BishopLabourMP for Forest of DeanMP since 2024
- Lord Black of BrentwoodConservativeMember of the House of LordsPeer since 2010
- Lord Black of CrossharbourNon-affiliatedMember of the House of LordsPeer since 2001
- Baroness Black of StromeCrossbenchMember of the House of LordsPeer since 2021
- Mhairi BlackScottish National PartyMP for Paisley and Renfrewshire SouthMP since 2015
- The Lord Bishop of BlackburnBishopsMember of the House of LordsPeer since 1986
- The Lord Bishop of BlackburnBishopsMember of the House of LordsPeer since 2009
- The Lord Bishop of BlackburnBishopsMember of the House of LordsPeer since 1995
- The Lord Bishop of BlackburnBishopsMember of the House of LordsPeer since 2019
- Dr John BlackburnConservativeMP for Dudley WestMP since 1979
- Ian BlackfordScottish National PartyMP for Ross, Skye and LochaberMP since 2015
- Lord BlackfordOtherMember of the House of LordsPeer since 1977
- Bob BlackmanConservativeMP for Harrow EastMP since 2010
- Kirsty BlackmanScottish National PartyMP for Aberdeen NorthMP since 2015
- Liz BlackmanLabourMP for ErewashMP since 1997
- Dr Roberta Blackman-WoodsLabourMP for City of DurhamMP since 2005
- 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
- Lord Blair of BoughtonCrossbenchMember of the House of LordsPeer since 2010
- Mr Tony BlairLabourMP for SedgefieldMP since 1983
- Baroness Blake of LeedsLabourMember of the House of LordsPeer since 2021
- Lord BlakeConservativeMember of the House of LordsPeer since 1971
- Olivia BlakeLabourMP for Sheffield HallamMP since 2019
- Rachel BlakeLabourMP for Cities of London and WestminsterMP since 2024
- Viscount BlakenhamCrossbenchMember of the House of LordsPeer since 1982
- The Lord BlakerConservativeMember of the House of LordsPeer since 1994
- Sir Peter BlakerConservativeMP for Blackpool SouthMP since 1964
- Lord BlanchCrossbenchMember of the House of LordsPeer since 1983
- Baroness BlatchConservativeMember of the House of LordsPeer since 1987
- Hazel BlearsLabourMP for Salford and EcclesMP since 1997
Source: parliament.uk · 1,424 currently sitting · Open Government Licence v3.0