It comes after Downing Street said it is ‘not possible’ to exempt ‘one or two offenders’ convicted of manslaughter from early release

Prime Minister Andy Burnham is reportedly prepared to "explore every option" to block the early release of PC Andrew Harper's killers Jessie Cole and Albert Bowers

PC Andrew Harper, a 28-year-old police officer, was killed in August 2019 after responding to reports of a stolen quad bike in Berkshire.