A man who was arrested on suspicion of murdering of British politician Ann Widdecombe has now been released and is no longer part of the investigation, police say.

British police have arrested a suspect in the killing of Ann Widdecombe, a former British member of Parliament and reality TV contestant.

Ann Widdecombe, a 78-year-old former Tory MP turned Reform UK spokeswoman, was found dead in her home with serious injuries, police said.