Retrospective erection of balcony as approved for planning mission F/TH/19/0513 Change of use of retail storage area along with 2-storey rear extension, to create 1no. 2-bed maisonette, together with provision of rear balcony and alterations to fenestration at second floor level, following removal of existing rear fire escape to allow guard rails of balcony to extend to edge of extension walls to create a balcony terrace