The 225 m, 52-storey Leadenhall Building was a project realised by new perspectives and practical innovations at every stage. At feasibility stage, M3 created a brief that optimised the potential of the emerging Eastern Cluster and identified value adding opportunities for and around the site. At concept stages, the building externalised the core for more flexible floorplates, and inverted the lower levels for a better public realm. Detailed design interrogated and embraced construction technologies to ensure buildability to enhance the design. Demolition took place from the bottom up. Construction on the constrained site was 80% pre-fabricated and sequenced seven floors at a time. M3 selected and steered the team through the challenges to create a building that is distinctive and contextual, on the ground and the skyline.