The Thames Barrier has reopened after shutting earlier due to high waters.
Further storms are expected in the next 24 hours.
The #ThamesBarrier is now open. We may have further closures over the next few days as the flow upstream remains high.
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Police have released an e-fit of a man suspected of attacking her.
The force has been tweeting after carrying out a series of dawn raids.
Adenike Akingbogun made the dangerous manoeuvre after ignoring the crossing lights and driving onto the tracks.