The new tower provides an icon for the airport and a symbol of its ongoing development. Its realisation at the heart of Europe’s busiest airport represents a significant achievement for the client and the whole team. The lower two elements of the scheme, the base-building and the mast are well engineered, but it is the Cab which is the culmination of the composition in every respect. Six storeys in height, it was prefabricated and transported to the site as a single structure. In order to provide a clear 360 degree view the control room roof is supported by structural steel mullions which also house the services. This is a spectacular solution to a difficult problem, and is a lucid expression of its function and technology.