The measure, put in place to monitor exports from EU territory and if necessary to block them, has already been used once to prevent an AstraZeneca shipment leaving Italy for Australia.
Prime Minister Boris Johnson has announced what he has called a cautious but irreversible roadmap out of England's third national lockdown.
"It's all pointing in the right direction, but I think nobody can say with certainty that this is... finished," he told lawmakers. "We're certainly not out of the woods yet, even on this wave."