London Assembly member Jenny Jones has questioned the sentencing of a man who killed a police officer by running him down as he tried to stop his car.
Gary Bromige, also known as Gary Cody, was sentenced to eight and a half years in prison.
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The eagle-eyed resident spotted the mistake on signs just feet apart in south London.
The victim was attacked after bumping into a man at the ticket barrier at Putney Station.
The victim, who is his 40s, was found near the edge of palace grounds.