The member of staff indicated that he did not have access to them and the four offenders left empty-handed. No weapons were seen and no-one was injured.

The offenders, who are described as being of large build, ran off towards the main road where it is believed they may have had a vehicle though none was seen.

Officers would like to hear from anyone who saw four men behaving suspiciously in the vicinity or has any more information which would help them with their inquiries.

Anyone with information is asked to call Warwickshire Police on 101 or contact Crimestoppers, anonymously, on 0800 55511 or www.crimestoppers-uk.org