The stabbing of Conservative MP Sir David Amess is the latest attack on MPs in their constituencies, including the murder of Jo Cox.
The country was rocked when the 41-year-old Labour MP for Batley and Spen was shot and stabbed in her constituency by a far-right supporter on June 16, 2016.
In May 2010, East Ham MP Stephen Timms was stabbed twice in the abdomen by Roshonara Choudhry, an Islamic extremist who claimed she had wanted “to get revenge for the people of Iraq”.
Mr Timms suffered serious injuries and according to police was “extremely fortunate not to have been killed”. He remains an MP.
Nigel Jones, then MP for Cheltenham, was severely injured in January 2000 when he was attacked in his offices by a man with a sword.
Andrew Pennington, a Gloucestershire county councillor, was killed in the same attack while trying to defend the then-MP.
He was posthumously awarded the George Medal for bravery.
The attacker, Robert Ashman, had been suffering from paranoid schizophrenia and was deemed unfit to stand trial and was ordered to be detained indefinitely in a secure hospital.