Three storey rear extension to enlarge existing flat 5 (ground floor) and flat 6 (first floor). Construction of an additional storey with a new roof structure above with hip to gable to both ends to create new second and third floors including 4no. dormer windows and 6no. rooflights to rear roofslope and 8no rooflights to front roofslope, to provide an additional 6no. flats. Associated external alterations including provision of additional parking spaces