It's more than 20 since the Macpherson Inquiry - commissioned after the death of Stephen Lawrence - declared that the Metropolitan Police was "institutionally racist". (Subscribe: https://bit.ly/C4_News_Subscribe) 

Last summer, in the wake of the Black Lives Matter protests, Scotland Yard commissioner Cressida Dick told this programme the label no longer applied.

Tonight, though, the most senior Asian woman in the force - until she quit last year - says she disagrees.

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