London violence: Sven Badzak 'could have been prime minister'

Sven Badzak met Boris Johnson when his mother campaigned for him in the 2008 London mayoral election race

A 22-year-old man who was stabbed to death in north London "was going to be prime minister" his mother has said.

Sven Badzak was found fatally injured after he fled from a group of males in Kilburn on Saturday.

A 16-year-old boy remains in hospital in a critical condition following the attack. No arrests have been made.

Prime Minister Boris Johnson said his thoughts were with Mr Badzak's mother "and her family in mourning the loss of her son".

Jasna Badzak called on Mr Johnson, for whom she campaigned during the 2008 London mayoral race, to "help get justice for Sven".

Her son met other well-known Conservative politicians when he was younger, through her campaigning work with the political party.

Asked what she would say to Mr Johnson, she said: "This is a child and his mother who helped you get elected. You knew Sven. You were high-fiving him as your mate.

"I want to hear from him, from [David] Cameron, from [George] Osborne."

Sven had a lifetime of opportunities in front of him, his mother said

Mr Johnson pledged to do more to prevent young people from being "sucked in the nihilistic" gang culture.

The prime minister said there had been a big fall in crime figures, but that would be "no consolation to a grieving mother".

Police said Mr Badzak and his 16-year-old friend were attacked as they fled from a group of males at about 17.40 GMT.

Det Ch Insp Darren Jones said the pair became separated and Mr Badzak was attacked on the ground after he fell.

The teenager managed to seek sanctuary in a shop and survived, although he remains critically ill, Det Ch Insp Jones said.

Jasna and Sven Badzak with former chancellor George Osborne

Mr Badzak was a former pupil at Wetherby School in Notting Hill, which was also attended by Prince William and Prince Harry.

Mrs Badzak said her son, who was planning on becoming a lawyer, had been in the Willesden Lane area "to buy some orange juice and get a bagel".

"Sven was the person everyone was saying was going to be the prime minster," she said.

Her son "was a child who would never raise a hand unless he was going to lift you up", she said.

"He was that charming, spoke with a perfect voice and no-one could shut him up in an argument.

"He had a lifetime of opportunities in front of him.

"I keep expecting him to come through the door. I want him in my home and to never be away from me."

Police said there had been no arrests in either of the fatal stabbings in Croydon and Kilburn

Mrs Badzak called on anyone with information about the killing to come forward.

"Enough is more than enough," she said.