How elections work, the first-past-the-post system and its strengths and weaknesses, other voting systems used in the UK, and who can vote.

What this dot point is asking

AQA wants you to explain how elections work, how first-past-the-post operates, its strengths and weaknesses, the other voting systems used in the UK, and who can vote. You should be able to evaluate first-past-the-post and, where a question gives vote figures, work out the winner and percentages. This Politics and participation topic (Paper 1 Section B) regularly mixes short "Explain" questions on the strengths and weaknesses of first-past-the-post with applied questions that give constituency results, so being comfortable with a simple percentage calculation is worth practising.

How elections work

Each voter in a constituency casts a single vote for one candidate. The party that wins the most seats nationally usually forms the government, and its leader normally becomes Prime Minister. If no party wins an overall majority of seats, the result is a hung parliament, which can lead to a coalition (parties governing together) or a minority government. General elections must be held at least every five years. Understanding that the UK elects 650 separate local MPs, rather than electing a government directly, is essential to understanding why the seat count can differ so much from the national vote share.

First-past-the-post

Strengths: it is simple to understand and quick to count; it produces a clear, identifiable constituency MP responsible to local voters; and it usually delivers a single-party government with a working majority, giving strong and stable government able to pass its programme.

Weaknesses: it is not proportional, so a party can win far more or far fewer seats than its share of the national vote; many votes are "wasted" (votes for losing candidates and surplus votes for safe winners change nothing); smaller parties with support spread thinly across the country win very few seats; and a candidate or government can win on well under half the votes. These weaknesses are the basis of arguments for changing to a proportional system.

Other voting systems

Parts of the UK use other systems. Devolved bodies such as the Scottish Parliament and the Senedd in Wales use forms of proportional representation (PR), which match the share of seats more closely to the share of votes and give smaller parties a fairer chance. PR systems tend to produce coalitions because single parties less often win an outright majority, which supporters say makes government more representative and critics say makes it less decisive. AQA does not require detailed mechanics of each PR system, but you should know that PR exists, is used for some UK bodies, and contrasts with first-past-the-post by being more proportional.

Who can vote

Some people are not entitled to vote in general elections, including members of the House of Lords and most convicted prisoners while serving their sentence. Being old enough is not enough on its own: a person must also be on the electoral register, which is why registration drives matter for participation. AQA expects you to know the basic qualifications and the importance of registration.