33.This section applies where a high hedge notice relates to a high hedge which includes a tree or forms part of a group of trees subject to a tree preservation order. Section 34(1) provides that a tree preservation order has the meaning given by section 160(1) of the Town and Country Planning Act 1997. Such an order can be made by a planning authority providing for the preservation of trees or groups of trees or woodlands where it is expedient in the interests of amenity or that the trees, groups of trees or woodlands are of cultural or historical significance.