How Does the UK Parliament Work? A Simple Guide for the Life in the UK Test

The UK Parliament is the supreme legislative body of the United Kingdom. It consists of two chambers — the House of Commons and the House of Lords — plus the reigning monarch. Parliament's job is to make and pass laws, debate national issues, and hold the government to account. Understanding how Parliament works is essential for the Life in the UK test.

Parliament sits at the Palace of Westminster in London, often called the Houses of Parliament. It has existed in some form for over 700 years, making it one of the oldest legislative institutions in the world. According to the official Life in the United Kingdom handbook, Parliament is the centre of British democracy.

The UK uses a system called parliamentary democracy. This means that citizens elect Members of Parliament (MPs) to represent them, and the government is formed by the party that wins the most seats in a general election. The monarch's role is ceremonial — they give Royal Assent to laws but do not make political decisions.

The House of Commons is the elected chamber of Parliament. It has 650 Members of Parliament (MPs), each representing a constituency (local area) in the UK. The Commons is the most powerful part of Parliament because it is directly elected by the people and controls the government's budget and legislation.

Each of the 650 constituencies across England, Scotland, Wales, and Northern Ireland elects one MP using the "first past the post" system. This means the candidate with the most votes in each constituency wins the seat. According to GOV.UK, approximately 46 million people are registered to vote in UK general elections.

The House of Commons is where most new laws begin. MPs debate proposed legislation (called bills), ask questions of government ministers, and vote on policies. The party with a majority of seats forms the government, and the leader of that party becomes the Prime Minister. The official handbook identifies the Commons as the democratic heart of the UK system.

MPs represent the interests of their constituents. Any UK citizen can contact their local MP about issues that affect them. This direct link between voters and their representatives is a fundamental feature of British democracy, rooted in values that trace back to the Magna Carta.

The House of Lords is the second chamber of Parliament. Its members are not elected — they are appointed or hold their seats by hereditary right or religious office. The Lords reviews and revises laws proposed by the Commons, acting as a check on hasty or flawed legislation.

There are approximately 800 members of the House of Lords, though the exact number changes as members are appointed or retire. According to the UK Parliament website (parliament.uk), the Lords includes three types of members:

• Life peers: Appointed by the monarch on the advice of the Prime Minister. They hold their title for life but cannot pass it to their children. Most Lords are life peers.
• Hereditary peers: A small number (92) who inherited their titles. Their numbers were reduced by the House of Lords Act 1999.
• Bishops: 26 bishops of the Church of England, known as the Lords Spiritual.

The House of Lords cannot permanently block legislation passed by the Commons. Under the Parliament Acts of 1911 and 1949, the Commons can override the Lords if necessary. The Lords can delay a bill for up to one year, but ultimately the elected chamber has the final say. This is a key fact for the Life in the UK test.

Understanding the differences between the two houses is important for the test. The table below summarises the key distinctions.

Comparison Table: House of Commons vs House of Lords

House of Commons

• Members: 650 MPs
• How chosen: Elected by the public
• Title: Member of Parliament (MP)
• Leader: Speaker of the House
• Main role: Makes laws, controls budget
• Can block laws? Yes — final authority
• Represents: Local constituencies
• Term length: Up to 5 years (until next election)
• Government formed here? Yes — PM comes from Commons

House of Lords

• Members: Approximately 800
• How chosen: Appointed, hereditary, or bishops
• Title: Lord, Baroness, Bishop
• Leader: Lord Speaker
• Main role: Reviews and revises laws
• Can block laws? Can delay but not permanently block
• Represents: No constituency — national perspective
• Term length: Life peers serve for life
• Government formed here? No

The official handbook states that the House of Commons is the more important of the two chambers because its members are democratically elected. Test questions often ask about the number of MPs (650), the role of the Lords, and who can become Prime Minister.

The Speaker of the House of Commons is the MP who chairs debates and maintains order in the chamber. The Speaker is elected by fellow MPs and must be politically impartial, giving up their party membership upon taking the role. The Speaker does not vote except to break a tie.

The Speaker calls on MPs to speak during debates, enforces the rules of the House, and ensures that all sides get a fair hearing. According to the UK Parliament website, the Speaker's authority dates back to the 14th century. The phrase "Order! Order!" is traditionally used by the Speaker to call the chamber to attention.

The House of Lords has its own presiding officer called the Lord Speaker, who fulfils a similar but less powerful role. For test purposes, you should know that the Speaker is an MP who chairs the House of Commons.

A bill is a proposal for a new law or a change to an existing law. Most bills are introduced by the government, but individual MPs can also propose bills (called Private Members' Bills). The process of turning a bill into law involves several stages in both Houses of Parliament.

Step-by-Step: How a Bill Becomes Law

1. First Reading — The bill is formally introduced in the House of Commons. Its title is read out, but there is no debate or vote at this stage.
2. Second Reading — MPs debate the general principles of the bill. A vote is held. If the bill passes, it moves to the next stage.
3. Committee Stage — A small group of MPs examines the bill line by line. They can propose amendments (changes) to improve the bill.
4. Report Stage — The amended bill returns to the full House of Commons. All MPs can suggest further changes and vote on them.
5. Third Reading — The final debate and vote in the Commons. If approved, the bill moves to the House of Lords.
6. House of Lords Stages — The bill goes through the same stages (First Reading, Second Reading, Committee, Report, Third Reading) in the Lords. The Lords can suggest amendments.
7. Consideration of Amendments — If the Lords made changes, the bill returns to the Commons. Both houses must agree on the final text. This process is sometimes called "ping pong."
8. Royal Assent — Once both houses agree, the bill is sent to the monarch for Royal Assent. This is a formality — the monarch has not refused assent since 1708. The bill becomes an Act of Parliament and is now law.

According to the official handbook, the key facts to remember are that both houses must pass a bill and that Royal Assent is the final step. The Home Office expects test-takers to understand this basic process. You can practise related questions on our platform.

The Prime Minister (PM) is the head of the UK government and the leader of the political party with the most seats in the House of Commons. The PM is an MP, not a separately elected president. They are appointed by the monarch after a general election or a leadership change within the ruling party.

The PM chairs the Cabinet, a group of senior government ministers who run different departments such as health, education, defence, and finance. The Chancellor of the Exchequer is the minister responsible for the economy and the budget. According to GOV.UK, the Cabinet typically has around 20 to 25 members.

The Prime Minister and Cabinet are collectively responsible for government policy. They must maintain the confidence of the House of Commons — if MPs pass a vote of no confidence, the government must resign or call a general election. This principle of accountability is a key part of British democracy covered in the British values guide.

The opposition is the largest political party that is not in government. The leader of the opposition sits directly across from the Prime Minister in the House of Commons. Their role is to challenge the government, propose alternative policies, and hold ministers to account through debates and questions.

The opposition appoints a "Shadow Cabinet" that mirrors the government's Cabinet. Each shadow minister scrutinises a specific government department. Every Wednesday during parliamentary sessions, the PM answers questions from the Leader of the Opposition and other MPs during Prime Minister's Questions (PMQs).

According to the official handbook, the opposition plays a vital role in British democracy by ensuring that the government is challenged and held accountable. The test may ask about the role of the opposition or the function of PMQs.

Devolution means that some powers have been transferred from the UK Parliament in Westminster to regional parliaments and assemblies in Scotland, Wales, and Northern Ireland. These bodies make decisions on local matters such as education, health, and transport, while Westminster retains control over national issues like defence, foreign policy, and immigration.

The three devolved bodies are:

• Scottish Parliament — Based in Edinburgh, also known as Holyrood. It has the power to pass laws on education, health, justice, and some tax matters. According to the Scotland Act 1998, the Scottish Parliament was re-established after a public referendum.
• Welsh Senedd (Senedd Cymru) — Based in Cardiff. It makes laws on health, education, and the environment in Wales. It was originally called the National Assembly for Wales.
• Northern Ireland Assembly — Based at Stormont in Belfast. It manages local matters under a power-sharing arrangement established by the Good Friday Agreement (1998).

England does not have its own separate parliament. Laws affecting only England are passed by the UK Parliament at Westminster. The official handbook identifies devolution as a key topic, and test questions may ask which body governs which part of the UK. Review our key dates guide for important dates related to devolution.

A general election is held to choose all 650 MPs in the House of Commons. The UK uses the "first past the post" voting system, where the candidate with the most votes in each constituency wins. The party that wins the majority of seats (326 or more) usually forms the government.

General elections must be held at least every five years. The Prime Minister can call an earlier election with the support of Parliament. According to GOV.UK, voter turnout in recent general elections has been between 60% and 70% of registered voters.

To vote in a UK general election, you must be:

• Aged 18 or over on election day
• A British citizen, an Irish citizen, or a qualifying Commonwealth citizen
• Registered to vote
• Resident at a UK address

Citizens of EU countries cannot vote in UK general elections (though they can vote in local elections if they have retained pre-Brexit voting rights). The right to vote is considered a fundamental part of British democracy, and the test expects you to know the basic eligibility requirements.

Voting takes place at local polling stations on election day, usually a Thursday. Voters can also apply for a postal vote or appoint a proxy to vote on their behalf. Photo ID has been required at polling stations in England since 2023, following the Elections Act 2022.

Beyond Parliament, the test covers several other government institutions. Local councils manage services such as rubbish collection, planning, and local roads. The judiciary (courts and judges) interprets the law independently of the government. The civil service carries out government policy and is politically neutral.

The UK is a constitutional monarchy, meaning the monarch is the head of state but does not govern. The current monarch gives Royal Assent to laws and carries out ceremonial duties. According to the official handbook, the monarch acts on the advice of ministers and does not make political decisions. For more on the role of the monarchy, see our monarchs guide.

How Many MPs Are There in the House of Commons?

There are 650 Members of Parliament in the House of Commons. Each MP represents one constituency in the UK and is elected using the first past the post system. This number is one of the most commonly tested facts about Parliament on the Life in the UK test, so memorise it.

Can the House of Lords Block a Law?

The House of Lords cannot permanently block a law passed by the House of Commons. Under the Parliament Acts of 1911 and 1949, the Lords can delay a bill for up to one year, but the Commons can ultimately pass legislation without the Lords' agreement. The elected house has the final say.

What Is Devolution?

Devolution is the transfer of certain powers from the UK Parliament to regional bodies: the Scottish Parliament, the Welsh Senedd, and the Northern Ireland Assembly. These bodies make laws on local matters like health and education. Westminster retains control over national issues such as defence and immigration.

Who Is the Current Prime Minister?

The Prime Minister is the leader of the political party that holds the majority of seats in the House of Commons. The PM is appointed by the monarch after a general election. For the Life in the UK test, you need to understand the role of the PM rather than memorise the current officeholder, as this can change.

How Often Are UK General Elections Held?

UK general elections must be held at least every five years. The Prime Minister can call an earlier election with parliamentary support. Elections use the first past the post system across 650 constituencies. According to GOV.UK, the most recent elections have seen turnout between 60% and 70% of registered voters.

The UK Parliament is the supreme law-making body of the United Kingdom. It consists of the House of Commons (650 elected MPs), the House of Lords (approximately 800 appointed members), and the monarch. The Commons is the more powerful chamber because it is democratically elected and controls the government's budget and legislation.

Key facts for the test: Parliament has two houses, the Commons has 650 MPs, the Lords can delay but not block laws, a bill needs Royal Assent to become law, the PM leads the largest party in the Commons, and devolution gives some powers to Scotland, Wales, and Northern Ireland.

Understanding Parliament is essential for the Life in the UK test and for understanding British democracy. Start practising Parliament questions now or review the full study guide to make sure you are fully prepared.