Inappropriate behaviour on Hesworth Common

The Parish Council have received a number of reports of someone exposing themselves on Hesworth Common.  We are liaising closely with the Police on this, who need concrete evidence and an identity to take action, in the meantime they have asked to ask villagers to be vigilante, carry a mobile phone at all times and report (directly to them) any incidents immediately they occur.  Please do not approach the individual or take any action yourselves.  Thank you for your help.