The MBPA said the current suspensions of Commander Ali Dizaei and Britain's most senior Muslim officer, Assistant Commissioner Tarique Ghaffur, were proof that ethnic minority officers were treated less favourably than white staff.

BBC: Inquiries into Met racism worries

Those attending the parade included actor Ian McKellen and the UK's most senior openly gay police officer, Metropolitan Police Deputy Assistant Commissioner Brian Paddick.

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The nine-strong review committee included two senior judges, senior officials from the probation service and the psychiatric profession, a children's charity and Assistant Metropolitan Police Commissioner David Veness.

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