A British judge trying a knife-crime case stunned the court by pulling out a blade.

Campaign groups blasted Judge Roger Connor after he brandished a knife in front of a teenage defendant charged with wounding someone with a blade.

The 16-year-old’s lawyer asked Connor if he was committing an offense — and was told it was acceptable because the blade was less than 3 inches long.

Connor got out the folding black-handled knife at Oxford Crown Court to show how it worked. The boy, who denies wounding with intent and assault, had admitted using a knife and claimed he needed only one hand to open it.

Connor asked: “It happens I have a folding knife in my pocket. You need two hands to open it, don’t you?”

Under English and Welsh law it is an offense to carry in public a blade longer than 3 inches without good reason.

Furious anti-knife crime campaigners called last night for the judge to be fired.

“He should lose his job. One teenager a week is being murdered on the streets of Britain and here he is brandishing a knife,” Lyn Costello, co-founder of the Mothers Against Murder and Aggression campaign group, said.

“Enough is enough – we need to get tough on knives in this country and our judges should be handing out tough sentences, not brandishing their own.”

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