All trees with a stem/trunk diameter of 75mm (approximately 3 inches) or more at a height of 1.5m from the ground are protected in a Conservation Area.  You must give six weeks notice before carrying out work to trees in a Conservation Area that are not protected by a TPO. If there is no objection to the work being carried out, then we will let you know, but if we have concerns that the work may be damaging or that the tree should be retained, we will consider giving the tree full protection by issuing a TPO. Unauthorised work to a tree in a Conservation Area is a criminal offence.