A generation of children is becoming "middle-class gangsters", a court has been told after a barrister told the jury a knife killer was a "wannabe hardman from a wealthy family".

Grammar school student Yousef Makki, 17, was stabbed in the heart with a flick knife by his friend on a tree-lined street in leafy Hale Barns, an upmarket village in Cheshire in March.

The jury heard that the death was an "accident waiting to happen" after they indulged in "idiotic fantasies".

The young victim had won a scholarship to prestigious £12,000-a-year Manchester Grammar School.

But he and his friends, Boy A and another teenager, Boy B, both aged 17 and on trial at Manchester Crown Court, had led "double lives", the jury heard.

Despite the privileged backgrounds of the defendants, both from wealthy Cheshire families, they spoke and acted like "middle-class gangsters", the court heard. Neither defendants can be named because they are aged under 18.

In his closing speech to the jury, Alastair Webster QC, defending Boy A, said the "silliness" shown in the social media videos shared by the boys showed the stabbing was an "accident waiting to happen".

He added: "Juvenile gangsters playing around with knives. What's going on with a whole generation of children with the advantage of good families and good education?