Traffic is slow on the A3216 Queenstown Road after a broken down coach near Battersea Power Station partially blocked the road.
The coach broke down between Prince of Wales Drive and the A3205 Battersea Park Road at about 1.35pm.
It had caused congestion as far back as Vauxhall Bridge, according to Highways England.
The road was originally blocked southbound but all lanes have now been re-opened.
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