Conversion of existing roof space of each of the two residential blocks to provide a total of 4 x 1-bed self-contained flats and erection of dormer windows, skylights and alteration to external staircase (Application A) and; Conversion of existing roof space of each of the two residential blocks to provide a total of 2 x 2-bed self-contained flats and erection of dormer windows and skylights (Application B).