By Sarah Lee
By Steve Swann
BBC home affairs reporter
By Charlotte Franks
BBC News, London
By Tom Symonds
Home Affairs correspondent
By Noel Titheradge & Dr Faye Kirkland
A3212 London northbound severe accident, at A302 Bridge Street.
A3212 London - A3212 Parliament Street in Westminster blocked northbound at the A302 Bridge Street junction, because of an accident.
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