The only British Prime Minister to be assassinated was Spencer Perceval, who was shot and killed on 11 May 1812, while entering the House of Commons.
Perceval was the second Prime Minister of the United Kingdom, serving from 1809 to 1812. He was assassinated by John Bellingham, a disgruntled businessman seeking revenge for the British government's failure to compensate him for losses he incurred during his imprisonment in Russia.
The assassination of Spencer Perceval was a significant event in British history, as it was the only time a British Prime Minister was assassinated. It also highlighted the dangers of political extremism and the importance of protecting political leaders.