David Lammy has accused the Government of coming up with its commission on racial inequalities on the “back of a fag packet”.
Labour's shadow justice secretary claimed the Government created the idea to "assuage the Black Lives Matter protest".
The commission was announced by the Prime Minister in a comment piece in the Telegraph today.
Mr Lammy told BBC Radio 4's Today programme: "I don't know why he's announced a commission behind a paywall, in the Telegraph, buried in the middle of yet another article about Churchill.
"If he was serious, why are there no details about how it will be staffed, its remit, its terms of reference, its timetable? That's the question.
"It's because this was written on the back of a fag packet yesterday to assuage the Black Lives Matter protest. Get on with the action, legislate, move - you're in Government, do something."
Mr Lammy added: "You can understand why it feels like, yet again in the UK, we want figures, data - but we don't want action.
"Black people aren't playing victim, as Boris indicates, they are protesting precisely because the time for review is over and the time for action is now."
It comes after two weeks of Black Lives Matter protests in the UK as anti-racism momentum spread across the world in the wake of George Floyd's death.
In his comment piece, the Prime Minister acknowledged that the country had much more to do when it comes to tackling racism.
He said the commission on race and ethnic disparities would look at "all aspects of inequality - in employment, in health outcomes, in academic and all other walks of life".
But Mr Lammy said it was “deeply worrying - and frankly immature” that Britain was still having a conversation about whether racism actually exists.
In 2017 the Tottenham MP led the Lammy Review into the treatment of minority groups in the criminal justice system and found that many in those communities found the system was "stacked against them".
He added: "And, frankly, when you watch a man die like we did in eight minutes and 46 seconds - I'd like to ask Boris Johnson why he thinks the way to commemorate his death is to announce yet another commission, and why he insists on talking about statues.
"The Labour Party isn't talking about statues, the Lib Dems aren't calling for Winston Churchill's statue to be removed, neither are the Greens. The only person that wants to focus on Winston Churchill's statue is the Conservative Party and, frankly, it is bizarre.
"They want a culture war because they want to distract from the central issue. Implement the reviews: do something, change it, you're in power, you've been in power for a decade."
But Conservative Party mayoral candidate Shaun Bailey pointed out that Labour's Mayor of London Sadiq Khan had launched a commission to review the capital's monuments. Mr Bailey accused Mr Khan of seeking to "rewrite British history".
He added: “I agree with David in one sense – we need to move, we need to move quickly.
"That’s what this point in history is about but with so many reviews out there you do need to collate these things and bring them together because it means massive change and that means bringing people with you.”
Mr Bailey said there was “definitely” things that could be implemented now that would have an immediate impact but added: “But what David didn’t focus on - this is not just about Government. In fact it’s hardly about Government. This is about hearts and minds.
"This is about people. This is about how you are treated when you walk into a coffee shop, when you apply for a job, when you go to school what people think your end point could be.
“It isn’t just about changing the law. Changing the law will not change the way people interact around people who are black or not.”
