Extensive works to the building included the CAT A fit out of three office floors, refurbishment of all common areas and various external reinstatement works. To meet increasing rental requirements, the specification was amended to provide new air conditioning system rather than overhaul the existing fresh air ventilation. West 1 were instructed to install a bespoke Daikin HVAC (VRF) system, providing conditioned air to all areas of the building. Installation of the new HVAC system included specialist crane access required to lift and install condenser units to the very restricted plant room.

Despite the scope of the HVAC contract variation, the construction phase programme was only marginally extended to incorporate the additional works.