Ann Widdecombe investigation police are probing whether the suspect held over her killing was motivated by left-wing extremism and planning further violence against other high-profile figures. Detectives say Miss Widdecombe’s death was a "targeted attack" and said whether the suspect in the alleged murder was targeting Reform UK figures will be a "line of investigation".

The police investigation is also probing whether left-wing extremism or other political motives were behind the killing, it has been reported. The 78-year-old former Tory MP and MEP was found bludgeoned to death at her home in Haytor on Dartmoor, Devon, on Thursday (July 9).

A 28-year-old white British man arrested in Rotherham, South Yorkshire, on Saturday remains in custody. He is being held on suspicion of commission, preparation, or instigation of acts of terrorism, as well as on suspicion of murder.

Counter-terrorism police are now in charge of the case after new evidence came to light, but a senior officer stressed the murder and terror investigations are currently working "in parallel".

Left-wing extremism is reported by the Daily Mail as being a "leading avenue of inquiry" for police.

Asst Commissioner Laurence Taylor told reporters on Tuesday the question of whether a TV appearance might have motivated her killing is also a "line of inquiry".

Miss Widdecombe spoke to Mark Dolan by video-link on Talk TV just after 8am on Wednesday. Police believe she was attacked at about 12.30pm the same day.

She was due to appear on Channel 5’s Matt Allwright show after 1pm. WhatsApp messages published by ITV News show a conversation between Miss Widdecombe and a producer from the show that day.

The former Conservative MP last sends a message at 12.19pm acknowledging she has received a Zoom link to appear on the programme, which read, "Received! Panic Over!".

Miss Widdecombe does not respond to a message asking her to join the Zoom call at 12.48pm and does not answer further calls or other messages attempting to contact her.

Mr Taylor said: "It is clear that this was a targeted attack. We are still working to understand the extent of any planning or preparation and the motivation that sits behind that attack.”

Asked if police were probing whether the suspect was targeting other Reform UK figures, he said: "So clearly, part of our responsibility when investigating offences of this nature is to assure ourselves and therefore the public and others of any extent of threat.

"That will form a line of investigation to ensure we are putting all appropriate measures in place to mitigate any threat, should it become apparent. I’m not saying there is or there isn’t at this stage."

Incoming prime minister Andy Burnham said after the update that a "serious review" was needed into MPs’ security.

He said: "It’s obviously appalling what happened to Ann. I knew Ann over many years in the House, and you know, we would get along – and everybody would get along.

"But it feels as though something has changed. It’s easy to blame social media, but it feels like it’s having some impact in just building that kind of toxicity that’s around the political debate."

Mr Burnham said the issue could not be solved by "easy, glib answers", adding: "I do think we need now a serious review of MPs’ security. I certainly am prepared to do that."

Miss Widdecombe’s death has reignited fears about the safety of MPs as it follows the murders of Conservative MP Sir David Amess in 2021 and Labour’s Jo Cox in 2016.

Former Conservative Cabinet minister Sir Robert Buckland has been carrying out a review into MPs' security. He said on Tuesday that those who would use a bullet or a bomb rather than a ballot box cannot be allowed to prevail.