London: The Joinery Workshop

Architect Henning Stummel and his partner Alice Dawson plan to convert a dilapidated joinery workshop in north London into a contemporary family home and office. They want to preserve the building's original steel frame, but to restore it they will have to take it down, which means carefully extracting it from the neighbours' walls without causing damage to their property - and that's just the start of the couple's problems. Kevin McCloud follows their progress.