Grandmother of murdered Harry Potter star says 'Britain is spiralling out of control' as man is charged with murder

Margaret Knox, 76, whose 18-year-old grandson had just finished work on the latest Harry Potter film, said parents must start taking responsibility for their children.

Rob (right) with his mum Sally and brother Jamie shortly before he died

'Any idiot can have a baby but bringing them up well is tough,' she said.

'It's hard work for parents. It's 24 hours a day, seven days a week. There is no rest. You have to put your life on hold.

'But the trouble is, people today want an easy life. There are babies being born to people-who are children themselves.

'These parents challenge the teachers, challenge the police. It's always someone else's responsibility.'

Her grandson was stabbed to death outside a wine bar in Sidcup, South-East London, as he tried to protect his brother Jamie, 17.

A 21-year-old man will appear in court today charged with murdering the teenage actor.

Unemployed Karl Bishop, of Beaver Lodge, Carlton Road, Sidcup, will appear at Bexley Magistrates Court charged with his murder.

Another five victims, all male and aged between 16 and 21, needed hospital treatment after being stabbed in the fight.

Bishop is also charged with five counts of wounding with intent relating to these attacks.

Rob Knox died from internal bleeding as a result of his wounds, a post-mortem examination found.

Mrs Knox said: 'Society in Britain today is spiralling out of control. Knife crime is not an innercity-problem, it's everywhere. It's a problem for all of us, all of society.

'We must start tackling this issue head on now to prevent anyone else suffering like my family and I.

'People need to be taught respect. It shouldn't be up to schools to instill respect. It must start with the parents at home before that.

'I know I can't bring Robbie back, he's gone forever. But the police and the Government must start getting tough with those carrying weapons. Action must start now.

'We are just a normal family doing the best we can in life. We all work hard, are respectful and look after each other. We don't expect anything to be given to us.

'I've taught all my family to work hard and then they'll achieve something. That was the ethic ingrained in Robbie.'

Heartbroken: Rob's mother Sally and brother Jamie

Father Colin Knox is emotional at the scene of where son Robert was killed

Talking nonsense on knives

It is 'plumb wrong' to suggest that searching teenagers on the street could be a risky way to tackle knife crime, a minister has said.

Tony McNulty, the Police Minister, was responding to a warning given by the Children's Commissioner Sir Al Aynsley Green that the tactic, which is being used in London, could 'antagonise' youngsters.

Mr McNulty said: 'He is plumb wrong. People want policemen not only to be out on the street but helping the process. I think the Children's Commissioner is just talking nonsense I'm afraid.'

But Sir Al's spokesman said: 'Stop and search can alienate communities. That is what we are trying to say.'