Constraints on the PM: Parliament, Party, Media, Events

While the PM is the most powerful political figure in the UK, their power is far from absolute. This lesson examines the key constraints that limit the PM's ability to act — and uses recent examples to illustrate how these constraints operate in practice.

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1. Parliament

Parliament is the most significant formal constraint on the PM. The PM must maintain the confidence of the House of Commons and cannot govern without a parliamentary majority.

How Parliament Constrains the PM

• Legislation — The PM needs Commons support to pass laws. Without a majority, or with a rebellious backbench, legislation can be blocked or amended.
• Votes of no confidence — If the Commons passes a vote of no confidence, the government must resign or seek a dissolution.
• Select committees — Committees scrutinise government policy, call ministers to account, and publish critical reports.
• PMQs and debates — The PM must regularly defend government policy in Parliament.
• The House of Lords — The Lords can delay legislation and force the government to reconsider.