There's already a UK ban on carrying knives in public unless you have an occupational need and they're wrapped up or at least not just sitting in your pocket.
Licensing wouldn't be worthwhile as almost every household would want knives for food preparation.
That is why I said that, as the comparison is pretty weak. The US' gun problem basically wouldn't be a topic of discussion if it was occurring at the rate mass stabbings do in the UK.
got a license for that mate?