Police are appealing for witnesses and information after a trailer was stolen in Abbots Langley.
The trailer, a large white Ifor Williams Box, had been parked in Shirley Road without a vehicle attached on Wednesday, January 16.
At about 2.30pm a man attached a car to the trailer and drove off.
The man has been described as white, of a stocky build, 5ft 9ins tall and in his late 20s or early 30s, with short light brown hair. He was wearing a black jacket.
The car he attached to the trailer is described as a large, dark grey 4x4 vehicle.
There was a spare wheel attached to the outside of the trailer.
Anyone with information should contact PC Daniela Howlett-Bolton on the non-emergency number 101, quoting crime reference number C2/13/99. Alternatively, call Crimestoppers on 0800 555 111.