Town and country planning – Development. The definition of 'mast' in para A.1(2) under Class A of Pt 16, 'Communications', of Sch 2 to the Town and Country Planning (General Permitted Development) (England) Order 2015 excluded from the scope of permitted development certain forms of 'building based apparatus other than small antenna and small cell systems'. The Court of Appeal, Civil Division, in dismissing the appeal of the appellant telecommunications company gave guidances, as a matter of law, on the interpretation of that provision.