The PM sets the date he hopes England's lockdown will begin to ease, but warns of a "perilous situation".
People without a valid reason for leaving the UK could face a fine, the home secretary says.
The bloc says UK plants are obliged to help make up for possible shortfalls in EU production.
But loss of taste and smell may be less likely to affect those with the new strain, a study suggests.
Philippa Day was found collapsed beside a letter rejecting her request for an at-home assessment.