To establish whether the change of external materials of roof to have interlocking concrete tiles in grey colour instead of previously approved red concrete interlocking tiles, the replacement of the existing and approved red facing brickwork of all walls and dormers, rear extension and porch walls and extensions to the dormers with white colour silicone, change of colour of rainwater gutters from existing white colour to black and the window frames at the rear and side only to be black finish, replacing existing white frames will constitute a non-material amendment to approved planning consent 25/01551/FULL..