The original façade which provided the building with stiffness and support was removed, and each of the tower floors was cantilevered out by a further 2.0m. The adjacent podium building was removed and a new 6 storey office constructed next to the existing deep basement. The overall site was also separated into two so that an adjacent development (60 Threadneedle Street) could be constructed, this included formation of a new city street. The existing concrete cores were stiffened and new office accommodation including raised access floors and suspended ceilings were inserted into relatively shallow floor to floor heights. Very extensive remodelling of the concrete structure ( “cut and carve” ), was undertaken at lower levels in order to reconfigure the entrance and podium levels.