Details of materials, method of construction, fittings and maintenance of the rebound fences and sound barriers pursuant to condition 18 of planning permission ref: 181990FULdated 09/12/2019 for: 'Demolition of existing buildings and construction of part three, part six, part seven, part eight, part eleven, part twelve and part thirteen-storey development over basement with educational use (Class D1) at ground, first and second floors to accommodate a 6FE secondary school and residential use (Class C3) on upper levels containing 113 units; construction of a two-storey residential building (use class C3) fronting Mill Hill Road containing three self-contained units; and associated bin and cycle storage, hard and soft landscaping and boundary treatment work, sports hall, outdoor play space, new parking area and other associated works'.