Member of Parliament (United Kingdom)

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In the United Kingdom a Member of Parliament (MP) (Aelod Seneddol (AS) in Welsh), is the title given to any one of the 650 individuals elected to serve in the House of Commons of the Parliament of the United Kingdom.[1]

Electoral system

All 650 Members of Parliament are elected using the First past the post voting system across 650 constituencies across the whole of the United Kingdom in England, Wales, Scotland and Northern Ireland where each constituency has its own single representative.


All MP positions become simultaneously vacant for elections held on a five-year cycle. The Fixed-term Parliaments Act 2011 sets out that ordinary general elections are held on the first Thursday in May, every five years.[2]

If a vacancy arises at another time, due to death or resignation, then a constituency vacancy may be filled by a by-election.

Under the Recall of MPs Act 2015 a by-election can be called if more than 10% of registered voters within the constituency concerned sign a petition of recall if a MP is found guilty of wrong doing.


An MP is known as The Right Honourable (The Rt Hon. or Rt Hon.) Name MP or simply as the Name MP (Name BA in Welsh). For instance, Alan Duncan is generally known to be entitled as The Rt Hon Alan Duncan MP but can be titled as just Alan Duncan MP.

See also


  1. ^ "What MPs do". UK Parliament. Retrieved 21 April 2017. 
  2. ^ "Fixed-term Parlliaments Act 2011". UK Legislation. Retrieved 16 August 2018. 
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