Put forward by RIBA J editor Hugh Pearman, this is part of the fine moulded-concrete glazed cloister at the Guildhall in the City of London by the under-appreciated Richard Gilbert Scott, built in the late 1960s and looking rather better than the humdrum 1950s extension there by his famous dad, Sir Giles Gilbert Scott. “The joint detailing may be a bit iffy, but these linked tree-like canopies anticipate the later work of Foster and Hopkins,” he says. “It’s, ahem, mould-breaking architecture.”