Defenders: Busting the Bad Guys S05E03 - Episode 3

DVSA inspectors investigate the cause of a horrific crash in which an HGV careered out of control, smashing through a motorway central reservation and killing two people. The HGV is found to have a defective braking system and is one of a fleet of vehicles operated by a company putting profits before safety. The haulage company's boss faces the prospect of jail after the inspectors discover he ignored warnings about the defective brakes.

Elsewhere, Trading Standards take strong action against a prolific cowboy builder who keeps changing his name to avoid detection and uses 30 different bank accounts to hide the thousands of pounds he charges people for work that's never finished.