The Lowering of the Voting Age: A Four-Nations Analysis

The United Kingdom does not have a single voting age. Depending on where a young person lives and which election is being held, the franchise begins at either 16 or 18 — a patchwork that is the direct result of devolution.

How the age reached 18

The current Westminster threshold is itself the product of reform. The voting age was lowered from 21 to 18 by the Representation of the People Act 1969, which made the United Kingdom one of the first major democracies to enfranchise people at 18. That change, once contested on much the same grounds heard in today’s debate, is now entirely uncontroversial — a reminder that the “right” voting age is a political settlement rather than a fixed fact, and that such settlements move over time.

Where 16- and 17-year-olds can vote

Scotland and Wales have extended the franchise to 16- and 17-year-olds for elections within their own competence — Scottish Parliament and Scottish local elections, and Senedd and Welsh local elections respectively. In those contests, voters of that age are on the register and cast ballots like any other elector.

The devolved extensions did not happen all at once. The decisive precedent was the 2014 referendum on Scottish independence, the first major UK vote in which 16- and 17-year-olds took part. The engagement of those voters was widely noted and helped make the case for keeping the lower age in Scotland’s own elections, which the Scottish Parliament then legislated for; Wales later did the same for the Senedd and Welsh local elections.

For UK general elections to the House of Commons, however, the voting age across all four nations remains 18, because the franchise for Westminster elections is reserved to the UK Parliament. The result is that a 16-year-old in Scotland may have voted several times in devolved and local contests before they are first eligible to vote for their MP.

The case for lowering it

Supporters of a uniform voting age of 16 make several arguments:

• Civic habit. Evidence from Scotland’s experience is often cited to suggest that enfranchising people while they are still in school, and can be supported by civic education, encourages a voting habit that persists.
• Stake in the outcome. Sixteen-year-olds can work, pay tax and, with consent, make a range of legal decisions; the argument runs that they have a legitimate stake in who governs them.
• Consistency. The current split is difficult to justify on principle, since the same person is judged old enough to vote in one election but not another held on the same day.

The case against

Opponents counter that:

• Maturity and information. Critics argue that political judgement benefits from greater life experience, and question turnout durability once the school-based support falls away.
• Coherence of the age of majority. Some prefer to align voting with a single threshold of adult responsibility at 18 rather than create another exception.
• Partisan suspicion. Because younger voters lean in identifiable directions on some issues, the debate is sometimes treated as a proxy for party advantage rather than principle.

The likely trajectory

The practical question is no longer whether 16- and 17-year-olds can ever vote in the UK — they already do, in millions — but whether the Westminster franchise will be brought into line with the devolved one. Internationally, such a change would not make the UK an outlier: Austria has used 16 as the voting age for all elections since 2007, and several other countries allow it for some contests. A commitment to lower the voting age for UK elections has also featured in recent governing programmes. Any such change would require legislation at UK level, and the issue therefore sits where many constitutional questions sit: settled in part, contested in the rest, and resolved ultimately by Parliament.