Construction of new fire escape stairs (c35sqm) between existing three storey block (Block 1) and four storey block (Block 2) school buildings including optional ground floor lobby (c18sqm), facing rear courtyard and minor internal modifications with new internal access from existing stair to attic level of Block 2, change of use of part attic space to general purpose room and circulation (c100sqm), and 7 No. roof lights over attic and all associated site works within the curtilage of a protected structure (RPS997).