The UK sets different minimum ages depending on the office. Since the Electoral Administration Act 2006, the general candidacy age is 18 for most elected positions.
| Office | Minimum Age | Notes |
|---|---|---|
| Member of Parliament (House of Commons) | 18 | Since 2006; previously 21 |
| House of Lords | 21 | Life peers; hereditary peers inherit at 21 |
| Scottish Parliament (MSP) | 18 | |
| Senedd / Welsh Parliament (MS) | 18 | |
| Northern Ireland Assembly (MLA) | 18 | |
| Local Councillor (all tiers) | 18 | Parish, district, borough, county, unitary, metropolitan |
| Mayor (directly elected) | 18 | Includes London Mayor, metro mayors |
| Police & Crime Commissioner | 18 |
Age is the only formal barrier for most offices; party selection and electability are practical hurdles.