Canary Wharf Contractors Limited appointed mTT as design and sustainability consultants for the extensive CAT A refurbishment and extension of 7 Westferry Circus, a 160,000ft2 office building with retail and basement. Various options for the building were explored to the exacting standards of Canary Wharf Contractors with an overall aspiration towards a BREEAM ‘Excellent’ rated building. The Columbus Building is located in the London Borough of Tower Hamlets.