A protester who disrupted a church service marking the 200th anniversary of the abolition of the slave trade will face no further action.
Mr Agbetu's outburst took place 10ft from The Queen
The Crown Prosecution Service has advised no charges should be brought against 39-year-old Toyin Agbetu.
He sparked a security scare after shouting during the service at Westminster Abbey in March, attended by the Queen and Tony Blair.
He said, "You should be ashamed", before being escorted outside.
Mr Agbetu, founder of the human rights group Ligali, was arrested under Section 5 of the Public Order Act and held overnight before being released on police bail.
Acted in anger
More than 2,000 people, including Tony Blair, the Queen, the Duke of Edinburgh, the Archbishop of Canterbury, Chancellor Gordon Brown and Deputy Prime Minister John Prescott were in the abbey for the national commemorations and witnessed the protest.
The outburst took place about 10ft from where the monarch was sitting.
Shaven-headed Mr Agbetu, who had a ticket for the event, stood with his arms raised, shouting: "You don't have the decency, Mr Blair, to make an apology and the word 'sorry', and you, the Queen..."
He called on members of the congregation to leave in protest.
"We should not be here, this is an insult to us. I want all the Christians who are Africans to walk out."
Mr Agbetu later said he had acted in anger at the hypocrisy of the occasion.
The day after the protest, he told digital radio station Colourful's drivetime presenter Henry Bonsu that he had hoped that the Queen and Mr Blair would follow the Archbishop of Canterbury's lead and say sorry for Britain's role in slavery.