Investigators probing a large-scale fly-tip of more than 600 tonnes of rubbish have released more details about the shocking incident.

The Bucks Free Press reported last week that a mountain of shredded waste was dumped at the former park and ride site at Cressex Island, High Wycombe, on January 29.

The Environment Agency, which is probing the fly-tip, says some readers have been in touch with them already with more information - but have released more details in the hope that even more will come forward.

CCTV shows that an earth barrier around the disused site was dug into by a digger just before 6pm on Wednesday, January 29 - with as many as 30 lorry-loads of waste dumped over the course of the next nine hours.

A constant stream of vehicles were seen dropping loads until 3.30am.

The Environment Agency wants to hear from anyone - possibly people who were at the nearby Empire cinema that night, who might have seen suspicious activity, including the lorry movements.

They are also keen to trace a man who was acting as a lookout in Crest Road.

Investigators think some of the lorries came from the Handy Cross direction.

An Environment Agency spokesman said: “Perhaps someone enjoying a film at the Empire Cinema on Wednesday 29 January saw something suspicious – lorries moving back and forth to the site; a person loitering in Crest Road that we think might have been a lookout.

“We’d ask anyone with information to call our free incident hotline, on 0800 807060, or Crimestoppers, anonymously, on 0800 555111.

“This is serious organised crime, leaving a huge mark on the environment. Our crime officers have launched an investigation and will take steps to identify the perpetrators.

“The Environment Agency has just launched the Joint Unit for Waste Crime, which will see us work even more closely with other enforcement bodies, like the National Crime Agency and HMRC, in the fight against waste crime.”