A petition to keep PC Andrew Harper's killers in jail has passed 1million signatures as pressure grows on Andy Burnham to keep them behind bars. 

The Thames Valley Police officer, 28, was killed in the line of duty after responding to reports of a quadbike theft near Stanford Dingley, Berkshire, in August 2019.

While pursuing the thieves, who were in a SEAT Toledo, PC Harper's foot got caught in the vehicle's tow rope before he was dragged down a road for more than a mile.

Driver Henry Long was jailed for 16 years, and passengers, Albert Bowers and Jessie Cole were sentenced to 13 years for manslaughter in 2020.

But Bowers and Cole are currently eligible for an early release as part of the government's effort to reduce prison overcrowding.

The petition organised by Aileen O'Connor, Chair of the Thames Valley Police Federation aims to stop their early release.

As of Friday morning it had reached more than one million signatures. 

Andy Burnham is now under increasing pressure to make sure the pair are not released when the early release scheme begins in October.

PC Harper's grieving mother said that she would be 'absolutely furious' if the Prime Minister went back on his pledge to block their early release.

Debbie Adlam told the Daily Mail's Trial podcast: 'This would have been all for nothing, I would just be absolutely furious because Andrew's life was ended in such a horrific way.

'The country expects justice and it just seems like we're being pushed off a cliff right now.

'I really don't know how I would get by if that was to happen.'

She added that she was 'absolutely drained' by the indecision from Downing Street about whether Cole and Bowers would remain behind bars and not be released in January.

The scheme would also see 5,000 people to be released early under sentencing changes, down from 6,000 after ministers exempted rapists and 'serious' child sex offenders. 

But the potential early release for Cole and Bowers has prompted widespread criticism from Police Federations and 50 policing leaders across the UK.

A letter from chief constables and other law enforcement leaders also called on the Prime Minister to 'establish an additional public protection safeguard' for the most serious offenders, when future early release schemes are floated. 

Suffolk Police Federation Chair, Darren Harris said: 'Every officer who puts on a uniform knows there are occasions when they may have to put themselves in harm's way.'

'That is part of the responsibility we accept when we become police officers. 

'But there also has to be confidence that the system will stand behind us when something goes catastrophically wrong.

'Officers and their families need to know that the sacrifice involved in this job is understood. 

'They need to know that an officer's life is not treated as an unfortunate footnote when decisions are made about sentencing and release.'

Following the police officer's death, Harper's Law was introduced which gives mandatory life sentences where an emergency worker in unlawfully killed in the line of duty.

A Thames Valley Police Federation spokesperson said: 'The petition to stop the early release from jail of PC Andrew Harper's killers has reached 1 million signatures.

'We would like to thank each and every person who has signed our petition for their support on this important issue.

'With the 7th anniversary of Andrew's death tomorrow, Thames Valley Police Federation have chosen to acknowledge this important milestone without fanfare, out of respect to his family at this difficult time.'