The unique design of the HP Wynyard facility, with its large first-floor plenum for cool air, also guides decisions regarding the placement of network cabling (shown above), which is housed above the IT equipment.
The UPS area (pictured below) is located in the rear of the lower level of the data center, following the recent trend of segregating power and mechanical equipment in galleries apart from the IT equipment. Heat from the UPS units is evacuated through an overhead plenum and then vented to the outside of the building along with waste heat from the server cabinets.
For additional details and a visual 3D "fly-through" of the airflow management in the Wynyard facility, see this video from Virtual Viewing. HP also has an animated overview on its Green Data Centre web page.