Longest Serving MPs in the UK Parliament

All current MPs ranked by the start of their current continuous Commons membership, earliest first. MPs first returned at the same general election share a start date and are shown as joint-ranked; the single most senior member — the House's 'Father of the House', set by order of swearing-in — is badged.

Rankings use official UK Parliament data — the Commons Votes API for voting and the Members API for MP details. Some measures are locally derived analysis by Ayes and Noes and are labelled as such; see the methodology on the statistics overview.

The ranking reflects the most recent data import. It refreshes as new divisions and member data are imported.