A British Bangladeshi Islamic State (ISIS) follower was sentenced to life imprisonment at the Old Bailey court in London on Friday after he was found guilty of hatching a terror plot to behead Theresa May in a suicide attack on Downing Street.
Naa'imur Zakariyah Rahman had been convicted of preparing acts of terrorism at the end of a trial in July after it was claimed he wanted to bomb the gates of 10 Downing Street, kill guards and then attack the British Prime Minister with a knife or a gun.
Rahman's plans were foiled as a result of a joint undercover operation by the Federal Bureau of Investigation in the United States and MI5 and Scotland Yard in the United Kingdom.
"I want to do a suicide bomb on Parliament. I want to attempt to kill Theresa May," the 21-year-old told undercover intelligence officers.
"There are lorries here with big gas tankers. If a brother can drive it next to parliament I will bomb," he unsuspectingly told an MI5 undercover officer.
At the sentencing hearing on Friday, Justice Haddon-Cave sentenced him to a minimum term of 30 years behind bars.
"I am sure that at all material times Rahman believed the devices to be real and capable of causing serious harm," the judge said, paying tribute to the way the 'extraordinary' case had been 'robustly investigated, prepared and presented'.
He said it would be 'extremely reassuring for the public as to how this remarkable investigation has been conducted'.
The plot was discovered after Rahman contacted an FBI agent who was posing as an ISIS official online.
His trial heard how he thought he was being helped by an ISIS handler when in fact he was talking to security officials as part of a major undercover operation mounted by counter-terrorism officers from the Metropolitan Police and MI5.
Met Police Deputy Assistant Commissioner Dean Haydon said: "His intention was to go to the gates of Number 10. He was going to detonate one of the devices that would have killed police officers and members of the public.
"His intention was then to go on through the gates of Number 10, detonate potentially another device there which would get him into Number 10, then, having a knife or gun, attack the PM.
"He was expecting to die in the process and essentially commit martyrdom, detonating a bomb in central London at the heart of government.
"If he had got hold of a genuine bomb, a gun, or a knife, we would have been talking about an individual who could have killed, injured and maimed a number of individuals in Whitehall."
Rahman was arrested in London in November last year, shortly after the last of a number of meetings with undercover police officers posing as terrorists, and where he had been provided with what he was told was a suicide vest and a bomb. -- PTI