A new initiative hopes to reduce the theft of trailers by educating owners and welding registration numbers.
The partnership between Central District Police and the Motor Trade Association (MTA) comes after nearly 200 trailers were stolen in the district last year.
Inspector Mark Harrison said one of the key drivers behind the number of thefts is that trailers are often left insecure.
"Many people see a trailer as a 'tool' and leave it on their front lawn or up the driveway unlocked and with no security on it," he said.
Further compounding this problem is the low recovery rate of trailers when they are taken – only a third of trailers stolen are recovered.