Application for a non-material amendment following a grant of planning permission ref : 20/01989/FUL (Erection of a single storey ground floor rear side infill extension together with a cycle store in the rear garden; and the erection of a rear mansard roof extension with the installation of three front rooflights together with the erection of an intersecting pitched roof behind the existing front parapet) granted on 24.08.2020. Amendment sought : Alterations to the proportions of the rear dormer window, increasing the width and height of the window. The approved dimensions are 700mm wide x 1000mm high. The proposed dimensions are 900mm wide x 1250mm high.