United Kingdom Prime Minister Andy Burnham said he is confident he can revise his government's early-release policy to keep the most serious offenders in prison, including the killers of Police Constable Andrew Harper.

Downing Street said it was 'not possible' to exempt 'one or two offenders' convicted of manslaughter amid an outcry at the possibility of Jessie Cole and Albert Bowers being freed.

The Prime Minister is said to have been examining whether to exempt people who kill emergency service personnel from a controversial scheme to free up space in massively…