The mother of murdered teenager Stephen Lawrence has launched a campaign to mark the 20th anniversary of his death.
Doreen Lawrence is calling for fairer community policing. It's one year since her son's killers were convicted.
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Tencho Hristov ignored warnings and got trapped between barriers at Roydon in Essex.
The 6km bike track will include 130m of the South Circular near Kew Bridge.
The unfortunate officer was taken to a central London hospital for treatment and his condition is not life-threatening.