Two cannabis warnings were issued and a knife was seized during a police operation on the M25.

Officers stopped more than 150 vehicles during the two-day cross-border operation, which targeted traffic, acquisitive and drug-related crime.

Operation Greenbelt was conducted on Monday (June 17) and Tuesday (June 18) and led by officers from the Three Rivers Operation Scorpion team.

They were supported by Three Rivers’ Safer Neighbourhood Teams - and were also joined by officers from neighbouring Thames Valley Police in the vicinity of Junction 17 (Denham Way) of the M25.

It straddles both the Hertfordshire and Thames Valley area, with officers having patrolled the main arterial routes that cross over between the two counties.

Vehicles were stopped using automatic number plate recognition (ANPR) technology, which identified people of interest.

During the operation, more than 20 traffic offence reports (TORs) and vehicle defect rectification scheme (VDRS) notices were issued to motorists.

Police also seized 15 vehicles for varying reasons, whilst 13 person and vehicle searches were conducted.

Three Section 59 warning notices were given for anti-social driving and riding, whilst a number of intelligence reports were submitted on persons of interest travelling through the area.

There were also multiple self-generated vehicle stops by officers in the area surrounding Rickmansworth, bordering Denham.

One person had also been arrested on suspicion of drug-driving. They have been released under investigation while enquiries continue.

PC Iain Rosser led the operation and is from the Three Rivers Operation Scorpion Team.

He said: “We are very pleased with the results from the past two days, which is just part of our ongoing work to detect, disrupt and deter cross-border criminals who travel from county to county to commit offences.

“During the operation we spoke to many motorists who were decent and law-abiding citizens, and we would like to thank them for their co-operation and understanding.

“It also highlighted the excellent working relationship between ourselves and Thames Valley.

“We share a common goal to relentlessly pursue cross-border criminals and ultimately protect our communities from crime. Hertfordshire is not an easy target and we will bring you to justice if you choose to offend here.”