Turning back the tide
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The Thames Flood Barrier is one of the largest moveable, tidal surge flood... -
The roof of each central pier looks like two ends of a tilted boat. -
Ten steel gates protect Central London from flooding. -
The gates are closed in pairs from the outside into the centre; ideally just... -
It takes 10-15 minutes for an individual gate to close. -
Closing the whole barrier for a flood defence operation takes one and a half...