London's flood defence walls will need to be 50cm (20in) higher in the future to protect against climate change, officials have said as they marked 40 years of the Thames Barrier. The barrier, officially opened by Queen Elizabeth II on 8 May 1984, was designed to protect London from flooding until 2030. It is now expected to function until 2070. It has been closed 221 times to prevent flooding in the capital. #thamesbarrier #thamesbarrier40thanniversary
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