Police are appealing for witnesses after four catalytic converters were stolen from cars in Royston earlier this week.

The thefts occurred overnight between Wednesday and Thursday in Wordsworth Close, Titchmarsh Close and Parthia Close – where catalytic converters were stolen from a silver Seat Alhambra, a silver Ford Galaxy and a blue Volkswagen Sharan.

Another catalytic convertor was also stolen at some point between July 24 and Tuesday from a white Mercedes-Benz Sprinter van in Eliot Road.

North Herts Local Crime Unit Detective Inspector Lynda Coates said: “If anyone witnessed the incidents happen or saw anyone acting suspiciously in the affected areas, please contact us as soon as possible.

“The theft of catalytic converters is very inconvenient and can lead to costly repairs so we are urging people to be vigilant. Residents and local businesses are urged to report any suspicious behaviour as soon as possible.

“With catalytic converter thefts in particular, look out for people hanging around vehicles at unusual times and make sure you make use of your drive or a garage to park your vehicle if you have one.”

Anyone with information is asked to contact police on 101, with crime reference number G4/15/541.

Police would recommend that people consider the following simple steps to reduce the chances of someone stealing your catalytic converter:

· Don’t park your car/van half on the pavement as it makes it easier for the thieves to get underneath it.

· Where possible always park in a garage or on a driveway.

· Get your catalytic converter security marked – it is cheap and may reduce your insurance.

· A sign in your window saying your catalytic converter has been marked can deter thieves.

· Clamps to secure your catalytic converter to your vehicle are an effective deterrent to thieves.