The daughter of murdered MP and devout Catholic Sir David Amess is taking legal action against Essex Police and the Home Office, for failing to stop his murderer.

Katie Amess has filed a personal injury claim against the authorities at the High Court.

Amess was stabbed to death while hosting a constituency surgery at Belfairs Methodist Church in Leigh-on-Sea, Essex in 2021.

Ali Harbi Ali stabbed Amess 21 times, as he met with members of the public. Ali was convicted of murder and preparing acts of terrorism in 2022 and handed a whole-life prison term. He claimed to target the MP over his vote for airstrikes on Syria.

The Old Bailey was told Ali, an Islamic State follower, had been known to the authorities prior to the attack following a referral to the Home Office’s deradicalisation programme years earlier. Despite this he continued to plot acts of terrorism.

An independent review of the Prevent programme last year found it to be failing.

Katie Amess’ lawyers say she wants to 'ensure proper accountability and learning'.

Daniel Machover, head of civil litigation at Hickman & Rose solicitors, which is representing Ms Amess, said: "Like so many others, Katie Amess was horrified both by the fact of her father's murder, and the circumstances surrounding it.

"She has issued a claim at court as part of her desire to ensure proper accountability and learning from Sir David's murder, including for the future benefit of others."

A Home Office spokesperson said it would be inappropriate to comment on the case as legal proceedings are ongoing.

An Essex Police spokesperson praised Sir David Amess for his commitment to public service in his community and reassured the public the police force is committed to supporting MPs in their duty and “regularly reviews and advises around security arrangements for our Members of Parliament.”