Murder of David Amess

On 15 October 2021, Sir David Amess, the Conservative Member of Parliament for Southend West, was stabbed to death while holding a constituency surgery at Belfairs Methodist Church Hall in Leigh-on-Sea, Essex. The attacker, Ali Harbi Ali, a British citizen of Somali heritage then aged 25, had used a false address to deceive Amess's staff into booking him an appointment. He travelled from London carrying a large kitchen knife and stabbed the 69-year-old MP more than 20 times. Amess was pronounced dead at the scene, and Ali was arrested there.

Ali had researched and planned attacks on MPs since 2019, drawing up a list of politicians who had voted for airstrikes in Syria and conducting reconnaissance, including trips connected to other MPs. On 11 April 2022, a jury at the Old Bailey (Central Criminal Court) found him guilty of murder and of preparing acts of terrorism. On 13 April 2022, Mr Justice Sweeney sentenced him to life imprisonment with a whole-life order, meaning he will never be eligible for parole. According to the Crown Prosecution Service, the killing was a terrorist act motivated by religious and ideological beliefs, with Ali inspired by Islamic State propaganda.

UK courts established that this was an act of Islamist terrorism inspired by Islamic State ideology, carried out by a lone, self-radicalised British citizen who targeted an elected representative over parliamentary votes on Syria. It was not foreign-state hybrid activity and shows no connection to Russian or other state-directed sabotage; the motive and direction were ideological and domestic in origin, though aligned with ISIS propaganda. The case underscores the threat that radicalised individuals pose to the accessibility of democratic representatives during routine public engagements.