It appears to be up in the air at the moment as to what is law and what is not.
The relevant sections of the Act (which has passed into law) is
Another consultation was run from August to October 2019, the feedback from which is apparently being analysed. As things stand, there is some hope – the following being taken from the Aug 2019 Statutory Guidance:
“There are defences available to the seller, under section 40 of the Act, including where the company took all reasonable precautions and exercised all due diligence to prevent the item being delivered to an under 18. The effect of this is that where a seller is sure that the bladed product will not be handed to an under 18, they can deliver it to a residential premises. Where no such arrangements are in place, the item will have to be collected in person at a collection point.”
“Under section 39 of the Act, it is an offence for a delivery company to deliver bladed products, sold by UKbased sellers, to an under 18 at a residential premises or to a locker.”