Operation Orbital is a joint Police and National Highways initiative.
Drivers committing mobile phone, seatbelt, and other safety offences will be recorded from the HGV “supercabs.”
The operation will also see checks carried out on vans and lorries for road worthiness, secure loads, weight, and drivers’ hours.
Over 7,500 vehicles travel round the M25 every hour, ranging from commuters getting to work to haulage firms delivering goods.