Minor non-material amendment to planning permission ref:18/00603/FUL (1) Change of use of offices to 3no. flats. 2) Alterations and raised decking to the rear, including external staircase and 2no. Juliet balconies) to amend details of doors and windows, and Juliet balconies; to alter staircase design and materials; provision of a gate to rear yard and timber cladding of rear boundary