Boris Johnson says the arguments for a judge led inquiry are "powerful and interesting" after claims of a smear campaign against Stephen Lawrence's family:
The Mayor was responding to calls from the murdered teenager's father for an independent judicial investigation.
It comes amid allegations an undercover officer tried to discredit the family shortly after Stephen's death.
Stuart Lawrence, the brother of Stephen, has told ITV's This Morning his family's lawyer has put 13 questions to the Met Police Commissioner regarding claims undercover officers hunted for information to smear the Lawrence family.
He says if they are answered a public inquiry would not be needed but says, if they are not, an inquiry would be in the public's interest:
Boris Johnson says he "certainly thinks the arguments for a judge led inquiry are powerful and interesting."
The Mayor was responding to calls from Stephen Lawrence's father for an independent judicial investigation into claims an undercover officer tried to smear the family shortly after Stephen was murdered.
Mr Johnson said the MPA needed to look at the calls but he added there are counter arguments.
The Mayor said there may also be a case for Tom Windsor from the HMRC to accelerate what he is already doing to look into this.
Scotland Yard will support a public inquiry into claims undercover officers hunted for information to smear the family of Stephen Lawrence, Commissioner Sir Bernard Hogan-Howe has said.
But the Metropolitan Police chief warned the process could be lengthy and inconclusive.
Speaking on radio station LBC, Sir Bernard said: "If you do have a public inquiry, it can take a long time and it's not always conclusive at the end of it.
Secondly, if there is more wrongdoing discovered, it still has to come back to the police or to the IPCC (Independent Police Complaints Commission) to investigate and prosecute.
"A public inquiry can decide who did what, but if you want to get into a criminal prosecution or a misconduct process, it still has to fall back to the police. You might end up having two parallel things.
"I'm content that the investigation has to continue to establish the facts, and if the Government or Parliament decides that it would prefer a public inquiry, then of course we would support that."
Leroy Logan from the Black Police Association said that "heads need to roll" over the cover up on the Stephen Lawrence murder case.
Speaking to Daybreak he said: "I feel surprised and I feel a sense of betrayal, and I feel for the family, I think it's totally underhand, and inappropriate and unjustifiable."
He added: "I don't know if anyone can authorise such a scrutiny."
Stephen Lawrence's father Neville has told ITV News UK Editor Lucy Manning that he wants a judge-led inquiry into allegations the Met Police wanted to smear the family after the murder of his teenage son.
Mr Lawrence said the inquiries announced announced today by Home Secretary Theresa May were "unsatisfactory".
He added that the family would not be "satisfied with putting a piece of paper over the cracks".
The investigation into whether an officer attempted to "smear" the family of murdered teenager Stephen Lawrence will focus on "getting to the truth," the Met Police said in a statement.
The claims were made in The Guardian.
The statement added:
"It is also important to recognise that any actions by officers working on or with the Special Demonstration Squad need to be understood by Operation Herne in terms of th eleadership, supervision, support, training, legal framework, tasking and reporting mechanisms that were in place at the time".
"At some point it will fall upon this generation of police leaders to account for the activities of our predecessors, but for the moment we must focus on getting to the truth."
Friend of Stephen Lawrence and Liberal Democrat councillor Duwayne Brooks said he was "calm and smiling" after being asked about the allegations of a smear plot against the the murdered teenager's family.
A lawyer who represents Stephen Lawrence's family has said claims by a former undercover police officer about an operation to try and smear the family are "alarming".
Michael Mansfield told BBC Radio 4's Today programme:
There is a high likelihood that a lot of what he (Francis) has said is right given that this unit, or squad, has been in existence for over 40 years.
My big question is: Who knew within the police , who authorised this public money being spent on this?
A squad of this size, involving these numbers, involving public expenditure of this kind does not go without authorisation from a very high level because if anything goes wrong they have got to be able to rely on the fact that they have got tacit, implicit support at the highest level.
I think that's why the public need to have something like the Leveson inquiry in relation to the ethics of policing in a so-called democracy.
Metropolitan Police Commissioner Sir Bernard Hogan-Howe has said that an investigation into undercover policing which will examine allegations about a smear plot against Stephen Lawrence's family is independent.
He also said it was not his call to make but he would support a judge-led public inquiry.
Stephen's father Neville has demanded a judge-led inquiry into suggestions of a smear campaign, dismissing as "completely unsatisfactory" Home Secretary Theresa May's announcement that they would be examined by two continuing inquiries.