Stars including Rita Ora, Beverley Knight and Jessie J have played a tribute concert marking 20 years since Stephen Lawrence's death.
Despite calls from Doreen Lawrence, Theresa May is insisting there is no need for a public inquiry at this stage.
A former police chief who was implicated in the Hillsborough cover-up has been linked to a campaign to smear the Stephen Lawrence family.
Baroness Lawrence, the mother of murdered black teenager Stephen, has credited Nelson Mandela with "starting" the campaign to bring her son's killers to justice.
"When he came out and spoke that he expected young blacks to be murdered in South Africa, but he never expected that in this country," Doreen told Daybreak.
She added the campaign to bring the 18-year-old's killers would have floundered without Mandela: "I don't think anybody would have done anything about Stephen's murder. He was the one who started the campaign."
Doreen and Neville Lawrence met the former South African president when he visited Britain in 1993 and 1998.
Doreen Lawrence, the mother of murdered black teenager Stephen Lawrence, has taken her seat in the House of Lords.
During the short ceremony where she took her seat in the House of Lords.
Now known as Baroness Lawrence of Clarendon she will become a Labour peer.
The Metropolitan Police have said they are "considering the IPCC's findings and recommendations" in relation to Stuart Lawrence's complaint.
The Independent Police Complaints Commission earlier confirmed that it had upheld Stuart Lawrence's complaint that he had been followed and stopped by an officer as he drove home last November.
A Scotland Yard spokesman said: "The Metropolitan Police Service has received the outcome of the appeal relating to Mr Lawrence's complaint and is considering the IPCC's findings and recommendations."
The Independent Police Complaints Commission have confirmed that it has upheld Stuart Lawrence's complaint over an incident last November.
The brother of murdered teenager Stephen Lawrence complained to police after being followed and stopped by an officer as he drove home in November.
A spokesman for the police watchdog said: "We can confirm the IPCC has notified solicitors acting on behalf of Stuart Lawrence the outcome of his appeal which was made in May.
"We confirm it was upheld in part and one Metropolitan Police Service officer has a case to answer for misconduct in relation to racial discrimination."
A Metropolitan Police officer has a case to answer in relation to a complaint by murdered teenager Stephen Lawrence's brother Stuart, the Independent Police Complaints Commission (IPCC) has confirmed.
Stuart Lawrence, 36, complained to police after being followed and stopped by an officer as he drove home last November.
The Met's professional standards unit originally cleared the officer of any wrongdoing, but after Mr Lawrence appealed, the IPCC ruled that the officer had "a case to answer for misconduct in relation to racial discrimination."
More than 20 other unrelated allegations of discrimination made against the Met by Mr Lawrence were rejected by the IPCC, it said.
Stephen Lawrence was 18 when he was stabbed to death in a racist attack as he waited at a bus stop in south London in 1993.
Former police chief Sir Norman Bettison will be investigated by a watchdog over claims he tried to influence the way a witness gave evidence at the public inquiry following the murder of Stephen Lawrence.
The witness was reportedly not a member of the Lawrence family
Former police chief Sir Norman Bettison will be investigated by the Independent Police Complaints Commission over his handling of the witness information for the Macpherson Inquiry into the death of Stephen Lawrence.
Chief Constable Mick Creedon, investigating undercover policing methods, says they have found no evidence whatsoever so far that police smeared Lawrence family.