Police are appealing for witnesses to the incident, which happened between 2.25pm and 2.55pm, on St Albans Road. The car, a grey Honda Accord Estate, was parked close to the roundabout and the junction with the B487 when thieves broke into it and stole a number of items, including the two pieces of road surveying equipment. Jenny Stredwick, from the Crime Service Team, said: The incident happened at a busy section of road and I would appeal to anyone who saw any suspicious activity at this time to contact me with information. The stolen items are also very distinctive and unusual, so I would like to appeal to anyone who sees them anywhere, or is perhaps offered them for sale, to get in touch. Anyone with any information should contact the Crime Service Team on 01707 355001 or via the non-emergency number 101. Alternatively, call Crimestoppers anonymously on 0800 555111.