Details of Condition 6 - details of the timber sash windows proposed to replace the existing upvc windows required by planning permission dated 25/06/2021 [LBS Ref 21/AP/0990] for 'Demolition of garage to the rear, with ground, first floor and basement extension of the property to facilitate conversion from 2 x flats (1 x 1 bedroom 1 x 4 bedroom) into 4 x flats (2 x 2 bedroom 2 x 1 bedroom) with rear balcony to the first floor and full restoration of the front facade'.