More than 130 people who claimed compensation following the London riots in 2011 are yet to receive a single penny, according to figures obtained by Labour.
It claims less than 16% of the requested cash has been paid out more than two years after violence and looting broke out across the capital.
The figures were uncovered through freedom of information requests to the Metropolitan Police.
The Mayor's Office for Policing And Crime has said Labour's got the figures wrong.
A spokesman said: " It is simply untrue to say that people are yet to receive a penny following the 2011 riots in London.
"Over 96% of insured claims have been settled. Only the most complex cases remain."
Tony Blair said the celebrations of Baroness Thatcher's death were in "poor taste".
Speaking to BBC Radio Ulster, he said: "Even if you disagree with someone very strongly, you can still particularly at the moment of their passing, you should show some respect."
Mr Blair was asked if he worried there would be similar celebrations when he dies.
He replied: "When you decide, you divide. I think she would be pretty philosophical about it and I hope I will be too."
Read: Margaret Thatcher's legacy.
Read: Thatcher funeral next Weds.
The former culture secretary Tessa Jowell, who is MP for the neighbouring constituency of Dulwich, has condemned the anti-Thatcher celebrations in Brixton and elsewhere in the UK as "disrepectful":
Democracy must always embrace legitimate dissent but the action in Brixton and elsewhere is disrespectful and completely out of order
Last night police dealt with a group of approximately 100 people in Brixton who caused low level disorder including throwing missiles at officers.
In order to protect the community and to ensure the highways remained clear extra officers were deployed.
Two women were arrested on suspicion of burglary after being found inside a shop in Brixton.
The shop front had been smashed.
This amateur footage of people celebrating Baroness Thatcher's death in Brixton has been uploaded to YouTube
This Brixton riots situation is just sad people are so stupid why can you just not stay in your house why cause a fuss and scene
So the 80s Brixton riots were caused by Maggie Thatcher's cuts, so how do the people of Brixton pay tribute? A RIOT
In Brixton, demonstrators have gathered to 'celebrate' Baroness Thatcher's death and the lettering of the Ritzy Cinema has been rearranged to say "Margret Thatchers dead".
The south London district was the scene of fierce rioting during the Thatcher years blamed on deep social divisions, racial tensions and unemployment.
In the aftermath of the 1981 Brixton riots, the prime minister was criticised for what some saw as a lack of understanding or denial of the causes of the disturbance, after comments such as:
"Nothing, but nothing, justifies what happened.
"Money cannot buy either trust or racial harmony."
Just one in 13 foreigners who took part in the riots of 2011 have been deported, it emerged today.
More than 200 foreign criminals were convicted for their part in the riots, which saw shops looted, businesses burnt to the ground and hundreds of millions of pounds of damage done.
Of the 201 cases passed to the UK Border Agency (UKBA), only 15 have been kicked out the country, showed figures released to the Daily Mail following a Freedom of Information request.
Immigration Minister Mark Harper said: "Any foreign national who abuses the privilege of coming to the UK by committing a serious offence should face the consequences.
"Many of those convicted of involvement in last summer's riots are still behind bars - that's where they belong. We are pursuing deportation in scores of cases and wherever possible, when they have paid their debt to society, we will remove them from the UK."
A man has been found guilty of supplying a gun to Mark Duggan, whose fatal shooting by police sparked the 2011 summer riots.Read the full story ›
Surprise guest Boris Johnson has joined Lord Heseltine at the launch but no sign of Kit Malthouse.
Heseltine says he had a simple philosophy: "show me a problem, show me who is in charge."
Johnson promises to form the task force "that joint effort to take Tottenham forward"