An Islamic State terrorist who plotted to kill Prime Minister Theresa May has been jailed for at least 30 years.
Naa'imur Zakariyah Rahman, 21, planned to bomb the gates of 10 Downing Street, kill guards and then attack Theresa May with a knife or gun.
He was arrested last November after collecting a rucksack and puffa jacket packed with dummy explosives from an undercover officer.
He was snared by a network of undercover counter-terrorism officers from the Metropolitan Police, the FBI and MI5.
Rahman, from Finchley, north London, was found guilty of preparing acts of terrorism despite claiming he was set up.
Helped a friend to join IS
The jacket fitted with dummy explosives given to Rahman by an undercover officer. Image: PA
During his Old Bailey trial, he admitted to helping a friend to join IS in Libya by recording an IS sponsorship video.
Following his conviction, he told a probation officer that he would have carried out the attack if he had been able to.
The "clever and cunning" young man had the potential to "operate below the radar to dreadful effect", according to a pre-sentence report.
Mr Justice Haddon-Cave concluded: "Rahman is a very dangerous individual and it is difficult to predict when, if ever, he will become de-radicalised and no longer be a danger to society."
Previously referred to de-radicalisation programme
The judge sentenced Rahman to life in prison with a minimum term of 30 years.
For the IS sponsorship video, Rahman was handed six years in prison to run concurrently.
The judge stressed the undercover officers involved in the case were "scrupulous" at all times and Rahman was the "instigator and author" of his own actions.
The trial had heard how Rahman was encouraged by an uncle who travelled to Syria to fight and was killed in a drone strike last June.
Two other uncles had been jailed in August 2016 for funding terrorism.
His concerned mother had moved to north London to get away from their influence, and Rahman was referred to the de-radicalisation Channel programme.
But Rahman spun a web of lies to Channel and went on to plot his attack over the course of two years.
Said Manchester bomber had ‘done well’
One of the fake explosives used by the undercover officer. Image: PA
He regarded the Parsons Green bombing as "the start" and hailed the Manchester Arena terrorist, saying he had "done well".
By early November last year, he appeared settled on an attack on 10 Downing Street with a suicide bomb, gun or knife.
He told an undercover officer: "(God willing) will be very big if I'm successful. I can't mess up. I can't get (martyrdom) if I get caught."
On November 18 last year, Rahman carried out reconnaissance around Whitehall.
Two days later, he bought a rucksack from Argos before meeting an undercover officer in Brixton for it to be fitted with explosives.
On November 28 last year, the officer handed back Rahman's rucksack and coat, now packed with dummy explosive devices and replica pepper spray.
Rahman told the officer he was "good to go" but was arrested as he walked away carrying the fake bomb, in Kensington.