The propellers are vital to a project in Turkey and the owner of the business has put up a reward of £1,000 for their safe and timely return.

The titanium propellers, which are each five feet in diameter, were stolen from Mixing Solutions in Bone Lane sometime between 5pm on Wednesday May 11 and 3.30pm on Thursday May 12.

Investigating officer PC Will Downey said: “They are a unique design and should be quite easy to identify.”

Anyone with information should contact PC Downey via the Police Enquiry Centre on 0845 8 505 505, or leave a message with Crimestoppers on 0800 555 111 if you don’t want to leave your name or speak to a police officer.