Request for a determination as to whether prior approval is required under Part 3 Class O of the Town and Country Planning (General Permitted Development) Order 2015 - Change of use from office(s) (B1(a)) to (C3) residential. (Class O). 15 x 1 and 2 bedroom flats. Discharge of condition 7 (Construction & Environmental Management Plan) of planning permission 21/00912/PACOM dated 26th August 2021