Study sheet: UK Electoral System

Course Outline

  1. Constitutional Foundations and Participation
  2. First Past the Post
  3. Universal Adult Suffrage
  4. Voting and Candidacy Qualifications
  5. Electoral Institutions and Constituencies
  6. Elections, By-elections and Reform
  7. Alternative Electoral Systems
  8. Proportional and Mixed Systems
  9. Referendums and Parliamentary Sovereignty

Key Dates

  1. 1868Chorlton v Lings rejected the argument that the Representation of the People Act 1867 gave women the right to vote
  2. 1918The Representation of the People Act enfranchised all men in parliamentary elections and women over 30 who were local government electors or wives of local government electors
  3. 1948The Representation of the People Act finally achieved a full franchise based on equality and the principle of one person, one vote
  4. 5 May 2011The UK referendum recorded 32% in favour of the alternative vote and 68% against it
  5. 2016The United Kingdom held a Brexit referendum

1. Constitutional Foundations and Participation

Key Concepts & Definitions

  • Constitutional law : A special and supreme form of law situated at the boundary between legal rules and political power, and it includes rules governing its own alteration.
  • Constitutionalism : The principle that governmental powers should be limited by a constitution establishing the framework of governance.
  • Universal adult suffrage : The adult electorate confers governing power and can hold government to account, subject to limited restrictions.

Essential Points

  • Political rights and participation, including elections and voting, are integral to constitutions, constitutionalism and the rule of law.

Memory Hook

Constitutional limits → protected political participation

2. First Past the Post

Key Concepts & Definitions

  • First-past-the-post : An electoral system in which the candidate receiving the largest number of votes in a single-member constituency wins without needing an absolute majority.

★ Must-know

  • The United Kingdom has 650 parliamentary constituencies, each represented by one Member of Parliament.

  • In the 2024 general election, Labour won 63.4% of seats with 33.7% of the vote.

Further detail

  • First-past-the-post has been used in Malaysia since 1954 and in the United Kingdom since the Representation of the People Act 1948.

  • First-past-the-post is argued to produce strong single-party governments with large House of Commons majorities and stable, decisive governance.

Memory Hook

Largest vote wins, whereas proportionality reflects vote share

3. Universal Adult Suffrage

Key Concepts & Definitions

  • Ideal electoral system : A full franchise subject to limited restrictions, equal voting power, legally and fairly regulated campaigns, and a representative legislature and effective government.

Memory Hook

F-E-F: Full franchise, Equal votes, Fair elections

4. Voting and Candidacy Qualifications

★ Must-know

  • A UK general-election voter must meet these conditions: be registered, be at least 18 on polling day, be a British, Irish or qualifying Commonwealth citizen, be resident at a UK address or be an eligible overseas UK citizen, not be legally excluded

  • The stated voting exclusions include: members of the House of Lords, non-qualifying citizens, convicted persons detained under sentence, persons convicted of corrupt or illegal electoral practices within the previous five years, persons detained under specified sections of the Mental Health Act 1983

📌 The Electoral Administration Act 2006 reduced the minimum age for candidacy in UK public elections from 21 to 18.

  • The disqualified classes include:
    • members of the House of Lords
    • holders of judicial office
    • civil servants
    • members of the armed forces
    • members of the police
    • members of non-Commonwealth legislatures
    • certain Commonwealth citizens
    • specified public-body members

Further detail

📌 The Representation of the People Act 1983 defines the UK right to vote, while the Representation of the People Act 2000 allows registration after residence on any date rather than only on a qualifying date.

Memory Hook

Eligibility to vote differs from eligibility to stand

5. Electoral Institutions and Constituencies

Key Concepts & Definitions

  • Electoral Commission : May advise and assist in elections and must promote public awareness of electoral and democratic systems.

★ Must-know

  • The Boundary Commission for England must review English parliamentary constituencies every five years under the Parliamentary Constituencies Act 1986.

  • In R (Electoral Commission) v Westminster Magistrates’ Court [2010] UKSC 40, the Supreme Court held that magistrates could order forfeiture of a lesser amount than the full unlawful political donation.

Further detail

  • The case concerned donations totalling £349,216 and a magistrates’ forfeiture order of £14,481.

  • Universal adult suffrage is used for elections to the House of Commons, devolved assemblies in Scotland, Northern Ireland and Wales, and local councils and mayors.

6. Elections, By-elections and Reform

★ Must-know

  • Under the Septennial Act 1715 as amended by the Parliament Act 1911, a Parliament could continue for five years and no longer.

  • The Dissolution and Calling of Parliament Act 2022 replaced the Fixed-term Parliaments Act 2011 framework for dissolving Parliament and calling general elections.

  • By-elections take place following the death or retirement of a Member of Parliament.

Further detail

  • Under the Fixed-term Parliaments Act 2011, an early election could follow failure to form a government within 14 days after a no-confidence vote or a two-thirds vote of Commons members.

Memory Hook

General election → vacancy → by-election

7. Alternative Electoral Systems

Key Concepts & Definitions

  • Alternative vote : A majoritarian system in which voters rank candidates, and the lowest-placed candidates’ votes are redistributed until one candidate obtains an overall majority.
  • Supplementary vote : Allows voters to indicate two preferences and transfers second preferences from candidates outside the leading two if no candidate initially secures 50%.

Essential Points

  • 🔄 The alternative-vote process is: counting first-preference votes, eliminating the lowest candidate if no candidate has 50%, transferring that candidate’s votes according to second preferences, continuing elimination until one candidate has an overall majority

8. Proportional and Mixed Systems

Key Concepts & Definitions

  • Single transferable vote : A proportional, multi-member constituency system in which candidates are elected after reaching a predetermined quota through first preferences or transferred preferences.
  • Party-list system : Allocates legislative seats to parties according to their nationwide vote shares rather than constituency results.

★ Must-know

  • Under the single transferable vote, voters rank candidates, candidates reaching the quota are elected, surplus or losing-candidate votes are redistributed by preference, and elimination continues until all seats are filled.

Further detail

  • In a five-member STV constituency, the quota is approximately one sixth of the votes cast.

  • The principal perceived defects of party-list systems are that they destroy constituency-based elections and place substantial patronage in the hands of party leaders.

Memory Hook

Constituency representation versus proportional allocation

9. Referendums and Parliamentary Sovereignty

Key Concepts & Definitions

  • Referendum : Directly expresses public opinion but does not legally bind Parliament or alter parliamentary sovereignty, although its result may be treated as morally binding on government.

Essential Points

  • The stated constitutional referendum contexts include: Northern Ireland in 1973 and 1998, devolution to Scotland and Wales in 1977 and 1997, London in 1998 concerning a directly elected mayor, London in 1998 concerning a London-wide elected authority

  • The United Kingdom left the European Union on 31 January 2020, and legislation providing for European elections and Members of the European Parliament was repealed under the European Union Withdrawal Act 2018.

📌 The Westminster system combines an elected legislature with a hereditary non-elective monarchy headed by King Charles III, whereas Malaysia has a federal parliamentary constitutional elective monarchy headed ceremonially by the Yang di-Pertuan Agong.

Memory Hook

Referendum morally binds government, but does not legally bind Parliament

Synthesis Tables

Comparison of Electoral Systems

SystemVoting and constituenciesOutcome
First-past-the-postOne vote in a single-member constituencyLargest vote total wins; not necessarily a majority
Alternative voteRanked preferences in a single-member constituencyTransfers continue until one candidate has an overall majority
Single transferable voteRanked preferences in multi-member constituenciesCandidates reaching the quota are elected proportionally
Party-listVote for a party on a nationwide basisSeats correspond to parties’ national vote shares
Additional member systemConstituency vote plus regional party-list voteCombines local representation with proportional top-up

Test your knowledge

Test your knowledge on UK Electoral System with 11 multiple-choice questions with detailed corrections.

1. What does constitutionalism require regarding governmental power?

2. What does constitutional law primarily regulate within a state's legal and political framework?

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Review with flashcards

Memorize the key concepts of UK Electoral System with 11 interactive flashcards.

What is constitutional law?

A supreme law governing legal rules and political power, including its own change.

Constitutional law

Governs the legal and political structure

What does universal adult suffrage mean?

The adult electorate grants governing power and can hold government accountable with few limits.

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