https://www.theregister.co.uk/2019/09/19/online_vat_inquiry_launched_following_fears_of_brexit_fraudster_surge/

An inquiry into online value-added tax (VAT) fraud is being launched this autumn, following concerns there may be an uptick in scams after Brexit.

It is estimated that the UK is missing out on between £1bn and £1.5bn a year from these sorts of deceptions, while the big online marketplaces have been accused of profiteering from the activities.