In Hampshire foreman Jim is out on an emergency job to repair a busy motorway slip road that is on the brink of collapse, with the banking that props it up about to turn into a landslide. To make matters even worse, his work site is visited by thieves in the night. In Buckinghamshire, Mick and Wayne argue over who is responsible for fixing a damaged driveway and Cheshire gritter drivers Richard and Andy take an underground tour of Europe's biggest salt mine