RU.21/1359. Prior approval application for Change of use from office (Use Class B1(a)) to form 49no. residential units comprising 21no. studios; 16no. 1-bed flats; 12no. 2-bed flats (Use Class C3) under the Town and Country Planning (General Permitted Development) (England) Order 2015 as amended Schedule 2, Part 3, Class O