Security expert Will Geddes says that the public shouldn't be too alarmed by the fact that a known terror suspect has entered the Olympic Park.
Instead, he says we should take comfort from the fact that the security services were able to track his movements.
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The robbers casually approached their victim on a busy high street before before spraying a noxious substance in his face.
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.