Police are urging people to be vigilant as more than 20 catalytic converters have been stolen since the start of the month in Hertsmere.

Hertfordshire Constabulary says 22 catalytic converters were stolen from vehicles across Borehamwood (8), Bushey (8), Potters Bar (4), Elstree (1) and Radlett (1) since the beginning of March.

The vehicles targeted include Lexus models and Toyotas, specifically the Prius and Auris hybrid models and a Honda Accord.

Catalytic converters contain precious metals and are attractive to thieves due to their high metal value.

Offences typically occur during the night but some happen in broad daylight, police said.

If a driver’s catalytic convertor is stolen it renders their car almost undrivable and can be costly to repair and replace.

Hertsmere Safer Neighbourhood Inspector Rachael Robertson said: “This is a continued focus for us in Hertsmere and we have been working to tackle this through increased patrols, particularly in hot spot areas. We are also contacting owners of the high-risk vehicles in the areas most affected to offer crime prevention advice.

“We will also be conducting some community engagement events to provide essential advice, as well as working with scrap metal dealers around what to look for when accepting catalytic converters.

“But we would urge people to be vigilant to this crime type. If you see anyone acting suspiciously around a vehicle, particularly where people are trying to get under cars in public car parks or on public roads, please call 999 immediately.”

A number of garages across Hertsmere are offering a free security marking service, including:

  • Kwik Fit, Elstree Way, Borehamwood, Herts WD6 1LB. Contact: 0208 207 1820
  • JTT Autotech, High Street, Potters Bar. Contact: 01707 658899/647755
  • C & C Motors, Unit 4 Cranbourne Industrial Estate, Potters Bar, EN6 3JN. Contact: 01707 644656