Complex sentence: It occupies the steep eastern slopes of the valley of Waskerley Beck, alongside and downstream of Tunstall Reservoir, some 3 km north of Wolsingham and is one of the largest expanses of semi-natural woodland in west Durham.
Split into simpler sentences: It occupies the steep eastern slopes of the valley of Waskerley Beck, alongside and downstream of Tunstall Reservoir, some 3 km north of Wolsingham. It is one of the largest expanses of semi-natural woodland in west Durham.