Gary Pearce from the GMB Union says that a strike by baggage handlers at Stansted Airport this Easter will have a big impact on the public.
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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.