The prime minister says he is determined to work out a way to stop PC Andrew Harper's killers from being freed early from prison. The case has dominated headlines in relation to the new government scheme to release some inmates early, to tackle overcrowding in prisons in England and Wales. Andy Burnham has asked Justice Secretary Alex Norris to present a new plan when parliament reconvenes in September. #UK #AndrewHarper #UKPolitics #C4News