Mayor Boris Johnson will tell the Home Affairs Select Committee later how public confidence in policing can be restored.
It comes after revelations that undercover police officers sought to smear the family of Stephen Lawrence.
Met Police Commissioner Sir Bernard Hogan-Howe will also be appearing.
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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.