This is the dramatic moment a 'trained Taliban-bomb maker' was taken down by armed police near Parliament just weeks after the Westminster terror attack.

Khalid Ali, 28, was arrested at the Parliament Street junction in London on April 27 last year, four weeks after Khalid Masood killed five people nearby.

The footage shows Ali, of Edmonton, north London, put his hands in the air and drop to the pavement when confronted by officers.

One asks him if he has anything on him that would cause harm, and he replies: 'You'll see.'

The shocking clip was shown to jurors at the Old Bailey today where he is on trial accused of preparing acts of terrorism.

Jurors were shown footage of Khalid Ali's arrest on April 27 at the trial at the Old Bailey

28-year-old (pictured on police bodycam video) was arrested at the Parliament Street junction on April 27 last year, four weeks after Khalid Masood killed five people nearby

Ali was arrested by armed police at the Parliament Street junction in Westminster last year - just four weeks after Khalid Masood killed five people, including a police officer, near there

Ali had spent five years with the Taliban before returning to Britain with a 'message' for the country's 'decision-makers', the court heard yesterday.

Jurors were shown video of him prowling around Westminster, where he had allegedly taken 'hostile reconnaissance' around Downing Street, New Scotland Yard, the Ministry of Defence, the MI6 building and the Cenotaph on March 18 and April 22 last year.

The footage shows Ali bleeding from a cut on his hand as an officer wearing forensic gloves searched his pockets and clothes.

Two knives were retrieved from his jacket pockets and a third from the waistband of his tracksuit bottoms. He was then further arrested for carrying the weapons.

Dramatic bodycam footage shows armed officers taking down Khalid Ali in Westminster

Stills from police bodycam footage shows the defendant on the ground with his hands behind his head

An officer told his colleagues: 'Let's make absolutely sure he has not got anything else before we put him in the car.'

Other officers seized the knives on the ground as Ali was led away in handcuffs.

While in custody, Ali's clothes were taken away and he was found to have a small cut in the front of his underwear where the largest of the three knives was found, jurors heard.

His DNA was on all three blades, said prosecutor Alison Morgan.

Khalid Ali spotted walking around London before he was arrested by Metropolitan Police

CCTV shows Whitehall terrorist Khalid Ali on Albert Embankment in central London

The court heard yesterday Ali had taken a Tube on April 22 from near his home in Edmonton Green to Vauxhall underground station, before walking to Westminster and through the underpass under the Victoria Embankment, through crowds of smiling tourists.

Three days later, Ali allegedly bought a Cook's Professional stainless steel knife and a Dura stainless steel chef's pack of three knives, as well as a Dura 11ins stainless steel carving knife and sharpener.

Ali entered a shop and asked a worker if 'they' could trace an international mobile identity number on a mobile phone.

As officers moved in they shouted out to Ali: 'Armed police. Armed police.'

Khalid Ali was filmed carrying out 'hostile surveillance' before his alleged planned attack

The prosecution alleges Ali was targeting MPs, police and members of the armed forces.

Early on April 27, his mother raised the alarm when she found knives in his bedroom at the family home in Edmonton, north London.

But he re-armed himself with more knives from Wilko before taking the Tube to Westminster, the court heard.

His mobile phone was later recovered from where he had dropped it in the River Thames in Westminster, the court heard.

Ali denies two charges of possessing explosives with intent abroad in 2012 and one charge of preparing terrorist acts in Britain.

The trial continues.