Shadow business secretary Chuka Umunna, the Labour MP for Streatham, wrote on Twitter: "Deepest condolences to the family of the lady tragically killed at a bus stop on Streatham High Road early this morning."
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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.