De-conversion of existing 2 flats into one self contained residential unit, involving the erection of a single storey rear extension at basement level, erection of a first floor rear extension. Alterations to existing cast iron railings to accommodate an access gate and cast iron staircase in front lightwell, repair work to existing external and internal fabric; replacement of existing roof finish from concrete tile to fibre cement slate; replacement of existing sash windows with double glazed timber sash windows.