New proposals to be outlined by the Government will ensure online shoppers have to collect knives in person.
While it is already a crime to sell knives to under-18s, now the measures will ensure the merchandise can’t be privately delivered and must be subject to an ID check.
Ministers insist this will frustrate the efforts by under-age individuals to purchase the knives remotely.
Home Secretary Amber Rudd announced the measure, saying the Government would consult on new legislation.
She said: “What we’re proposing is if you want to buy a knife online, it must be collected from a place and once you show ID.
“There is evidence young people are able to buy knives without ID checks and this has to stop.”