The Civil Aviation Authority has warned that it is aware of cases where estate agents may have broken the law by operating drones without a licence.

The CAA says they are risking fines of up to £5,000 and that it will prosecute companies that use drones without a licence for commercial purposes.

Drones are increasingly being used by high-end agents as a cheaper alternative to helicopter hire to get aerial shots. Drones can be bought for as little as £350.

A CAA spokesman said: “Any business or person operating an unmanned aircraft for commercial use, requires a permission from the CAA.

“To obtain a permission, they need to submit an operations manual demonstrating how they intend to use the unmanned aircraft, the person operating the device needs to be qualified, having successfully passed an approved training course and they need to have liability insurance in place.

“In addition, any business, which wants to fly within 50m of any property will need an additional permission from the CAA, again providing the necessary assurances.”

The spokesman added: “We are aware of a number of incidents where estate agents have potentially used unmanned aircraft without permission.

“We will be seeking to raise awareness of the rules within the sector.”