Boris Johnson has launched a pointed personal attack on former prime minister Tony Blair over his claims that the current conflict in Iraq is not linked to the West's 2003 invasion.
In his Daily Telegraph column, Mr Johnson said Mr Blair had "finally gone mad" and his "unhinged" attempt to rewrite history is undermining arguments for Western intervention in Iraq.
"In discussing the disaster of modern Iraq he made assertions that are so jaw-droppingly and breathtakingly at variance with reality that he surely needs professional psychiatric help," the London Mayor added.
He said that by refusing to accept that the 2003 war was "a tragic mistake", "Blair is now undermining the very cause he advocates: the possibility of serious and effective intervention.
"Somebody needs to get on to Tony Blair and tell him to put a sock in it, or at least to accept the reality of the disaster he helped to engender. Then he might be worth hearing," Mr Johnson concluded.
A barman has attempted to arrest Tony Blair during a night out with his family at an east London restaurant. The former prime minister was approached by Twiggy Garcia at Tramshed in Shoreditch.
Mr Garcia said he was making a citizen's arrest on the grounds that he was a "war criminal" who had launched an "unprovoked war against Iraq".
Speaking to Vice Magazine Garcia added:
"I was working at the bar... His security were sitting at the bar directly in front of me and I got nervous because I thought they overheard me say, "Should I citizen's arrest him?"
"I went over to him, put my hand on his shoulder and said: "Mr Blair, this is a citizen's arrest for a crime against peace, namely your decision to launch an unprovoked war against Iraq. I am inviting you to accompany me to a police station to answer the charge."
"One of his sons got up and went to get the plain clothes security from downstairs. I decided to get out of there sharpish, I’ve had a few run-ins with the police in the past and it never ends well."
A spokesman for Tony Blair said:
"There is nothing to report here apart from fact that Mr Blair did offer to discuss the issue - that offer was declined and the individual walked off. Nothing else happened. Everyone is fine and they had a great time at the restaurant."
The incident involving Katherine Blair is being linked with another attempted robbery nearby half-an-hour earlier. Met Police say: "On both occasions a firearm was seen but not used - no shots were fired. "None of the victims were injured and nothing was stolen during the incidents."
The first incident happened in Boston Place at 8pm involving a female victim and a male suspect.
Tony Blair's daughter was held up at gunpoint by two men during an attempted robbery on Monday evening.
Kathryn Blair, 25, was not hurt in the incident as she walked down a central London street with her boyfriend and a group of friends.
Scotland Yard confirmed an incident involving two male suspects with a gun took place in Ivor Place, Marylebone, at 8.30pm on Monday night.
The Blair family were seen at the wedding of Euan Blair last weekend.
Former Prime Ministers and their spouses at Baroness Thatcher's funeral Gordon Brown, Tony Blair, Norma Major, John Major, Samantha Cameron and Prime Minister David Cameron.
The man who disrupted the Leveson inquiry to accuse former prime-minister Tony Blair of war crimes will appear on LBC Radio this morning. David Wakelin stormed the court room after managing to evade security.
After his stunt stopped proceedings yesterday he said getting access to the inquiry was surprisingly easy.
Tony Blair's evidence to the Leveson Inquiry was interrupted today when a protester burst in and yelled "this man should be arrested for war crimes".
The man, who somehow managed to evade security, was swiftly removed from the court room after causing the disturbance. Lord Justice Leveson has ordered an immediate inquiry into how he got in to the Royal Courts of Justice.