Thames water's Tidewell Tunnel project to tackle overflows from London's sewers to the River Thames has been given the go-ahead by the government. The project involves the construction of a single tunnel -32.2km long and more than 7m wide - from Hammersmith in west London to Beckton in East London. There will also be an additional spur tunnel (5.5km long) from Abbey Mills in Stratford to Beckton.
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