The Atrium is a prominent, striking building in the heart of Uxbridge. Fully fitted suites available on 1st, 3rd available fitted or Cat A. The Atrium is a prominent, striking building set in the heart of Uxbridge. The multi-let landmark building has been comprehensively rejuvenated to exceed the expectations of its high-quality tenant mix with a design-led character that is fresh, chic and occupier focused.