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It's the second quarter-final and four more winners from the previous eight heats are now ready to paint, sew and build their way to win the last two places in the semi-final of the Great Interior Design Challenge.

This time the amateurs are being challenged to redesign four compact bedrooms in a 1950s brutalist tower block in Bethnal Green, east London. The spaces are smaller, but it makes the challenge tougher.

Designed by the architect Denis Lasdon who also designed the South Bank, architectural historian Tom Dyckhoff looks at the history of the block and how it was rescued from demolition to become one of the more desirable places to live in east London. While Judges Sophie Robinson and Daniel Hopwood cast their eyes over the various designs to see who is most deserving to go through to the semi-final.