As Bonecruncher wrote flick knives were banned back in the 1950's (in the u.k.- proper definition = self-opening knives)

weelittledrummer 'I could show you a shop window full of flick knives not four miles from here.'

If this is true (which I doubt. They may look like 'flick' knive but will not be) then have you reported it to the police. If they do nothing then a letter to any national newspaper will do the trick as they pounce on such stories.

As a target shooter I hear such rumours often as folk try to bad-mouth guns, knives etc. When faced with proving their 'facts' these people turn out to have nothing.

I am not saying this is the case with you WLD but you are doing no-one any favours by claiming illegal things here but not reporting them. IF these are 'flick' knives & a youth buys one & commits a murder with it, will you feel guilty for not reporting the shop?