The design of the building was heavily influenced by the site’s physical and environmental surroundings and a desire to create a sustainable development, which maximises natural resources and minimises CO2 emissions. The BREEAM Excellent rated building employs passive techniques to control thermal heating and utilises building orientation and massing. Open plan offices are arranged in fingers running from east to west to provide natural ventilation and cooling, and to ensure views across landscaped grounds to the countryside beyond. The long curving frontage of the building contains the business centre and the building's support facilities. It is designed to extend at each end as a free standing wall which acts as an acoustic buffer to shield the building and site against noise from a nearby motorway.

The atrium, which forms the social centre of the headquarters, includes terraces and curving staircases to create a bright and lively space. Visible from the campus entrance, it draws visitors in to the heart of the building.

The scheme includes a ground source heat pump, involving over 100 wells to augment heating and cooling loads, and the building features a state-of-the-art Building Management System which optimises energy use and thermal capture.