House of Commons (Member of Parliament - MP)
- Minimum age: 18 years
House of Lords
- Minimum age: 21 years
Devolved Parliaments and Assemblies
- Minimum age: Varies by jurisdiction:
- Scottish Parliament: 18 years
- Welsh Assembly: 18 years
- Northern Ireland Assembly: 18 years
Local Government
- Minimum age: Varies by role:
- Parish or Town Councillor: 18 years
- District or Borough Councillor: 18 years
- County Councillor: 18 years
- Metropolitan Borough Councillor: 18 years
- Lord Mayor or Provost: 18 years