All too often, details of serial numbers are not retained, making it more difficult for the police to trace stolen items.

The plea has been made by Police Constable Phil Nock, from Shifnal police station, who is currently investigating a series of thefts in the Bridgnorth area involving electric fence units.

He said: “There has been a surge in the theft of these items during the past few months in the Bridgnorth area, including Claverley, Bradney, Nordley and into the Wombourne district. It’s also possible some farmer have not reported thefts.”

PC Nock said he was particularly anxious to hear from anyone who has had a battery unit stolen and still has a record of the corresponding serial number.

“This would really help our investigations,” he said. “If a farmer suspects he has had a unit stolen and has retained the serial number, do give me a call at Shifnal police station on 0300-333-3000.”

The majority of electric fences stolen are Rutland ESB units with different model numbers and have a security sticker on the front showing the serial number. All units come with a warranty card which should be filled in soon after purchase and sent off to secure the two-year guarantee.

PC Nock added: “If this is done, then a record is kept by Rutland with the owner’s details. Unfortunately, in most cases, this card is not sent off.

“Farmers need to be aware what is happening and to take all possible security measures to protect their property.”