Reuse, build less, build lean: low-carbon design for 22 Bishopsgate, London

22 Bishopsgate was erected on the site of an abandoned project, reusing 100% of the existing foundations from three previous buildings, and incorporating more than 50% of the basement built for its predecessor. This article describes the approach to reusing the existing foundations and basement, as well as the focus on material efficiency in designing the superstructure and transfer structures.