The Bill - Season 18 Episode 15 Thin Ice
Overview: Stamp and Rickman pursue a stolen Porsche to a lock-up, where they find a number of false plates being applied to stolen high-end vehicles. Stamp and Rickman are suspicious when one of the victims, an accountant, has not reported his car missing. When Rickman spots a duo hanging around outside his office, she recognises them as visitors to the lock-up