Charles Barclay Architects designed the refurbishment and extension of a large Victorian house in Hampstead for two classical musicians, who wanted clean modern spaces but retained the best of the Victorian features. A new external stair connects the hallway and garden and a 10m pool was inserted into the lower ground floor with a glass extension into the garden. A large reception room was created that doubles as a performance space and a glazed-in slot allows the pool to be seen from the top of the stair well. The state-of-the-art kitchen above the pool has a glass floor. The glass roof of the pool room sets a record for the largest double glazed unit in the UK.