An unmarked HGV caught drivers using their mobile phones, not wearing a seat belt and keeping cars in dangerous condition during a motorway operation. Operation Tramline involves officers using an unmarked heavy goods vehicle to spot drivers committing offences on the M4 between junctions 14 and 18. The HGV gives us an elevated view into cars and lorries so we can identify those committing offences. Once the spotter has seen and captured evidence of a driver breaking the law, the trailing convoy of marked police cars is informed and the offender is safely stopped. Hear from Sgt Rich Hatch and PC Rebecca Wilman who were involved in the operation. #wiltshire #police #highways #tramline