This is the terrifying moment two violent robbers attack a mother in Wildwood Road, Hampstead Garden suburb, in front of her 10-year-old son.

The two hooded men are seen creeping up on Tania Levenfiche, 48, on her driveway while one grabs her by the throat and drags her onto a car bonnet before ripping out her earrings.

The other is seen repeatedly kicking the family dog.

Serial robbers Eugene and Devlin Williams were today jailed for a total of 14 years after schoolboy Didier memorised their faces, activated the house alarm as the attackers fled in a BMW. He later identified them in a police line-up.

Police today praised the heroic actions of the UCS pupil who had just arrived home with his mum Tania when the Williams brothers sneaked up behind her on June 13 last year.

Ham & High: Jailed: L-R, Devlin Williams, 33, of Hirst Crescent, Wembley, and Eugene Williams, 36, of Station Road, Forest Gate.Jailed: L-R, Devlin Williams, 33, of Hirst Crescent, Wembley, and Eugene Williams, 36, of Station Road, Forest Gate. (Image: Archant)

Didier was later named Westminster police’s hero of 2016.

Devlin Williams, 33, of Hirst Crescent, Wembley, pleaded guilty to one count of robbery committed on June 13 last year and two separate offences of robbery on August 4 and 7 2016. He was sentenced to six years and eight months’ imprisonment.

His brother Eugene Williams, of Station Road E7, pleaded guilty to robbing four women between November 19 2015 and June 13 2016 as well as possession of criminal property. He was jailed for eight years.

Mrs Levenfiche today expressed disappointment and shock at the ‘lenient’ sentences.

While praising Westminster police for their ‘hard work and sheer determination’ in catching the pair, she said: But now I am shocked and extremely disappointed at the lenient sentence. These are two very violent offenders. I never expected them be caught and it is thanks to the hard work of the police that they were and they should be behind bars for longer.

“My son has since had continuous nightmares about the attack and is so scared to get in and out of the car in our driveway at any time of the day or night.

“He has not slept a whole night since the incident and also is very disturbed by the fact that the attackers kicked our dog over and over as she tried to jump up at them to help me. Please remember that he watched this whole incident and the face of the attacker staring at him.”

Detective Constable Martin Thomas, the investigating officer from Westminster’s Crime Squad, said: “Eugene and Devlin Williams are dangerous criminals who targeted innocent people across London.

“Thanks to Didier’s attention to detail, both men were arrested in August 2016 and successfully picked out at an ID parade. Didier’s brave actions directly led to them being brought to justice and we are very proud to have named him as our hero of the year.”

DC Thomas added: “The level of violence used against these victims was gratuitous and has left them traumatised. Westminster Crime Squad have worked tirelessly to convict these robbers who used the proceeds of their crime to fund their lifestyle. London is much safer with these violent men bought to justice and behind bars”

Didier was presented with his award for his part in catching the robbers by a detective from the Met at an assembly at University College School in December.

“We are extremely proud,” said headmaster Lewis Hayward. “He reacted with great bravery and coolness - two characteristics you really admire in children.”