The development will consist of single storey extension with attic storage space to rear of existing school comprising 2 no. mainstream classrooms with en suite toilet facilities to replace 2 no. existing on site pre-fab classrooms, assisted disabled toilet, two outdoor toilets,  infill of open space corridor between the existing building and the new classrooms with new flat roof,  and all associated site works.    The development also includes the re-location of external fire escape stairs to serve the attic storage space, connection to existing services  together with modifications to existing elevations and internal plan layout .