Partial demolition of the existing sixth and seventh floors, roof top plant room and the existing facades, excavation to extend the existing basement level to the full footprint of the site and excavation to create a part basement level two. Erection of extensions to the rear of the site and rebuilding of the seventh and new eight floor level, plus plant room, for use as retail (Class E a) at ground and part basement level one, office use (Class E (g) (i)) on all remaining floor levels. Associated alterations including terraces, greening, cycle parking, and PV panels.