Police are appealing for witnesses to ‘extremely costly’ criminal damage at the Marriotts School building site in Stevenage.

Officers want to speak to anyone who saw or who has information about the damage caused between April 8 and 11, when a hole was cut through a three metre high security fence and a barbeque lit in the grounds.

The offenders are thought to have played football and left behind litter before leaving through the cut fence.

Investigating officer, Pc Hal Palmer, said: “I am appealing to anyone who may have seen any suspicious behaviour around the site, when the builders were not working there, to get in contact with me. Damage such as this has proved extremely costly to the construction company and this form of behaviour will not be tolerated.”

Police will be carrying out regular patrols of the area, he added.

Anyone with information is asked to email Pc Palmer at Chells@herts.pnn.police.uk, or call 0845 3300 222, citing crime reference E1/11/2512.