Police investigating the death of the wife of a convicted killer have arrested a man on suspicion of murder.

Diane Stewart, 47, died at her home in Bassingbourn, Cambridgeshire, on 25 June 2010.

Police arrested a 57-year-old man from Bedford on Tuesday and he has since been released under investigation.

Mrs Stewart’s husband, Ian Stewart, was convicted of murdering a children’s author who had been drugged and suffocated last year.

Mrs Stewart’s cause of death was put down to an epileptic seizure in the garden of the family home.

An inquest was held but police said last year they were re-examining her death after Ian Stewart’s conviction in February 2017 of the murder of his fiancee Helen Bailey.