Jo Cox, a British Member of Parliament, was murdered in her constituency.

Helen Joanne Cox was a British politician who served as Member of Parliament (MP) for Batley and Spen from May 2015 until her murder in June 2016. She was a member of the Labour Party.

The Parliament of the United Kingdom of Great Britain and Northern Ireland is the supreme legislative body of the United Kingdom, and may also legislate for the Crown Dependencies and the British Overseas Territories. It meets at the Palace of Westminster in London. Parliament possesses legislative supremacy and thereby holds ultimate power over all other political bodies in the United Kingdom and the Overseas Territories. While Parliament is bicameral, it has three parts: the sovereign, the House of Lords, and the House of Commons. The three parts acting together to legislate may be described as the King-in-Parliament. The Crown normally acts on the advice of the prime minister, and the powers of the House of Lords are limited to only delaying legislation.

On 16 June 2016, Jo Cox, a British Labour Party politician and Member of Parliament (MP) for Batley and Spen, died after being shot and stabbed multiple times in Birstall, West Yorkshire. In November 2016, 53-year-old Thomas Alexander Mair was found guilty of her murder and other offences connected to the killing in an act of terrorism. The judge concluded that Mair wanted to advance white supremacy and exclusive nationalism most associated with Nazism and its modern forms. He was sentenced to life imprisonment with a whole life order.