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"Barrier Block", Brixton

Southwyck House, a block of flats in South London, is also known locally as "Barrier Block". The block was built in around 1970, at a time when there were plans for a 6-lane elevated motorway to pass in front of the building. The block was designed to bounce traffic noise back, and to protect residents from fumes. The motorway formed part of the "London Ringways" plan, which would have seen motorways built in 4 concentric circles around London. The overall plan was abandoned, although some stretches of motorway have been built.