Police are investigating a theft that occurred on 24 October between 5:30am and 6am on Brampton Road in Carlisle.
The victim, a 42-year-old man from Carlisle had his trailer stolen whilst it was attached to his own vehicle.
The offender was male and drove a black old-style BMW with tape over the number plate.
Police are looking to speak with anyone who may have witnessed the incident or who can provide any further information.
Anyone with information is asked to call PC Murry on 101, or call Crimestoppers on 0800 555 111.