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George Clarke helps unlock the potential of two houses in south London. He begins by helping NHS theatre nurse Hannah, whose Edwardian workers' cottage in Thornton Heath is so small she has had to give the only decent bedroom to her two children while she sleeps in the front room. Can he provide the luxurious master bedroom she needs? George also helps a couple renovate their Streatham home, which would not be so bad if not for the previous owners' love of glass chandeliers, Roman columns and marble-effect tiles

The last quarter-final sees amateur designers transforming two rooms in 1930s art deco flats. One hopeful takes a risk by introducing a 'mock crocodile' pattern to their client's gentlemen's club brief, while the other's butterfly-inspired effect seems a little too dominant. However, the challenge is really on for one designer when a possible asbestos outbreak means work has to be halted. Will they get finished on time? Presented by Tom Dyckhoff, with judges Kelly Hoppen and Daniel Hopwood

George Clarke helps unlock the potential of two houses in south London. He begins by helping NHS theatre nurse Hannah, whose Edwardian workers' cottage in Thornton Heath is so small she has had to give the only decent bedroom to her two children while she sleeps in the front room. Can he provide the luxurious master bedroom she needs? George also helps a couple renovate their Streatham home, which would not be so bad if not for the previous owners' love of glass chandeliers, Roman columns and marble-effect tiles