It comes as scientists warn university outbreaks are "entirely predictable" and had been modelled.
A man is held in Norwich by police investigating the death of Sgt Matt Ratana in south London.
Customs officials said hospital material and plastic was found in the shipment, in breach of rules.
Silvana Tenreyro said evidence from countries that have introduced the policy was “encouraging”.
David Lammy says his party could support Tories looking to increase scrutiny of Coronavirus rules.