This is the moment two teenage thugs stole an iPhone from a charity worker before stabbing him to death during a four-hour rampage through London in which they knifed four of their nine robbery victims.

Nathan Gilmaney, 19, and Troy Thomas, 18, tried to rob as many people as possible, leaving a trail of destruction in their wake on October 16 last year. They were jailed for more than 20 years each today.

They killed 28-year-old Abdul Samad for his iPhone and little more than 'aggression and blood lust' as they swept across west London on a scooter.

The chilling video shows the criminals calmly return to their victim to demand his PIN number before knifing him.

Police released dramatic footage showing their pursuit of Gilmaney and Thomas after the attackers also made off with the youth worker's wallet.

Moped robbers Nathan Gilmaney, 19, and Troy Thomas, 18, have been jailed for a crime spree which terrified a series of victim and left a charity worker dead

Abdul Samad, 28, handed over his iPhone and other valuables when he was confronted by the teenagers in Paddington, west London - but they killed him anyway

The teenagers were likened to '21st century highwaymen' pictured here putting on balaclavas ahead of the crime spree and murder

This is the knife found by police after the charity worker's death

The riders moved between five difference locations, attacking nine people and killing Abdul Samad (pictured)

Gilmaney was sentenced to life imprisonment with a minimum of 27 years and Thomas detained at Her Majesty's pleasure with a minimum of 22 years at the Old Bailey on Friday.

They chatted to each other at times during the hearing, repeatedly smiling and laughing together in the dock.

Their sentencing comes amid a spate of violence across the capital, as today footage emerged of machete-wielding moped thugs threatening a doctor for his Rolex just five miles from where comedian Michael McIntyre was robbed of his watch.

The public gallery was packed today, with several people dabbing their eyes as statements were read on behalf of Mr Samad's mother and girlfriend, Sultana Ahmed, who said that she felt as though she had died when her adored boyfriend was killed.

In a victim impact statement she said: 'He had the most amazing personality. He was caring, kind, loving and everyone adored him.

'I had seen Abdul grow into a beautiful human being who always wanted to help people in whatever capacity he could.

'The last thing Abdul said to me was, "watch, this year will be our year and we will be a family".

'He also said, "I will give my mum and dad the perfect gift in the new year - which is you as a daughter-in-law".

'Abdul lived for his job of helping children; he was the change we needed to see in the world.

'Every time I close my eyes I remember his laughter, his infectious smile and I cry because I remember the day I went to the mortuary to see him and how my world shattered.'

The robbers took this iPhone from their victim and decided to stab him when he refused to give them the pin to get into it

Londoners suffer 50 moped-crimes a day Shocking figures reveal there are more than 60 moped thefts a day on London's streets. Moped or motorbike-enabled crimes were up 50% on the last 12 months, figures published this month reveal. Separate statistics reveal 86 per cent of robberies and 78 per cent of burglaries in the UK went unsolved last year. Advertisement

Abdul's mother, Layla Begum, said she feels like a dead woman since her son's passing, which left her feeling as though a 'vital organ' was missing.

'The death of my son has absolutely broken my husband, my eldest son, my entire family and me,' she said. 'Since his death there has not been a single moment that goes by for me without shedding tears.'

Gilmaney shouted obscenities moments after the sentence was passed and the public gallery had to be cleared after repeated outbursts.

Judge Richard Marks QC described the victims family's statements as 'heart-rending' and added: 'Abdul Samad was an outstanding young man in his 20s, engaged to be married and had his whole life ahead of him. Your wicked stabbing of him has left his family understandably utterly devastated.'

Gilmaney knifed the charity youth worker in the chest in an attempt to get the PIN for his phone, the judge said.

After being stabbed, Mr Samad collapsed on his doorstep in front of his horrified parents while the robbers prowled the streets for their next victim.

Their spree of violence was committed over four hours in north west London and involved nine knifepoint robberies.

Gilmaney stabbed four other victims, who all survived, and admitted that he attacked one man because he was 'angry' he had tried to run away.

The judge described CCTV footage of their crimes as 'chilling'.

Rule change to tackle spiralling problem Rules on police chasing crooks are being changed to give officers more confidence to pursue violent moped criminals who throw off their helmets. Ministers want to smash the 'myth' that officers cannot chase helmetless riders in case there is an accident and the thugs are killed or suffer major injuries. Police Minister Nick Hurd acted amid concerns police were finding themselves in the dock over high-speed chases as they can be prosecuted for dangerous or careless driving like any other motorist. Under Government proposals, the rules will be tweaked to recognise police drivers' high level of training. Advertisement

The culprits were arrested following a police chase, their pockets stuffed with stolen valuables.

Thomas admitted robbing the victims but denied responsibility for the violence while Gilmaney pleaded guilty to the robberies and violence.

The pair, from Maida Vale, west London, were found guilty of murder following a trial.

Michael Turner QC, representing Thomas, said he was acting as a getaway driver and had 'no intention to kill'.

'He was not the wielder of any weapon,' he added.

Gilmaney's barrister Dexter Dias QC said he suffers from ADHD and has an IQ of 'barely 60'.

He has a number of previous convictions, including robbery and drugs offences, and wore a grey tracksuit in the dock.

Thomas, who wore a Gucci t-shirt, also has a string of convictions for other offences and was on bail at the time of the robberies.

Teenage moped thugs attacked nine during their two-hour west London spree Nathan Gilmaney, 19, and Troy Thomas, 18, attacked nine members of the public during their two-hour moped spree on October 16 last year. They began their rampage at around 10.30pm in Maida Vale, where they tried to rob Nazmul Chowdhury. An hour later the duo attacked Venezuelan Ehimer Fierro-Berbesi and his aunt Ana as they sat outside their Maida Vale home having a cigarette. Moped robbers Nathan Gilmaney, 19, and Troy Thomas, 18, were jailed for a crime spree which terrified a series of victim and left a charity worker dead Then charity worker Abdul Samad, 28, was fatally stabbed in Little Venice. Minutes later they happened across Joseph Denby as he walked in Ladbroke Grove, but he fortunately escaped with his wallet and 'old Nokia'. Juan Perez Buendia was confronted shortly after having stepped off a bus on Ladbroke Grove. He threw his bag at the robbers' feet and ran off, also discarding his phone as the pair gave chase on the scooter. By this stage, the two defendants were carrying the proceeds of five armed robberies and decided to try to sell some of what they had just stolen. Shortly after 1am, they visited a block of flats off the Harrow Road in Ladbroke Grove and sold some of the items including Mr Samad's iPhone and foreign currency which had been in Mr Perez Buendia's bag. Abdul Samad, 28, handed over his iPhone and other valuables when he was confronted by moped muggers in Paddington, west London - but they killed him anyway This is the knife found by police after the charity worker's death Just after leaving at about 1.05am, Graipich Vudto was stabbed in the stomach in Ladbroke Grove by Gilmaney after refusing to hand over his phone. Silverio Pina was stabbed in the arm by Gilmaney at 1.10 before both again fled. At around 1.15am the pair snatched Natevan Casinova's mobile straight out of his hand as they roared past him at the junction of Portobello Road and Pembridge Road. They later punched a young girl after she ran away from them. They then stabbed Nelson Aparicio in the stomach at about 2am after demanding his phone. Nathan Gilmaney and Troy Thomas moved between five difference locations, attacking nine people and killing Abdul Samad (pictured) Advertisement