100 Liverpool Street – which is nominated for the 2022 RIBA Stirling Prize – is a cornerstone development for British Land’s masterplanned Broadgate regeneration, within the historic City of London. It was designed by Hopkins Architects. Two 1980s-era office structures have been assimilated, reconfigured and extended within the delivery of the modern mixed-use programme; the scheme adds +40% in functional area while reusing 50% of the superstructure and 100% of the foundations. Altogether, this pioneering design solution saves an estimated 7,000 tonnes of CO2, in comparison with the notional new construction.