Ministers are planning a major overhaul to how knives are bought online after Southport triple killer Axel Rudakubana purchased weapons off Amazon before carrying out a sickening rampage at a Taylor Swift-themed dance party. Under plans being considered by the Home Office, buyers would need to submit an ID document to online retailers and record a live video or selfie to prove their age. Plans for a tougher crackdown are expected to be accelerated amid the fallout from the Southport attack last July. As well as clamping down on knife sales, social media firms were also ordered to take down 'dangerous' online material blamed for fuelling Rudakubana's obsession with violence.