The Johnson Building by Allford Hall Monaghan Morris
77 Hatton Garden, London
This £27 million mixed-use development has 14,000m2 of office space and jewellery workshops and a separate 14-flat apartment building. It knits together a group of 1940s office buildings around a new atrium topped by a translucent PTFE rooflight.
Despite there being little visible change on the street, the total lettable floor area has increased by 50 per cent.