Sir Patrick Vallance says it's still too early to know when the measures can end.
Eerie scenes at major airports across the UK as air travel comes to a halt.
Special charter flights will be arranged for countries where commercial flights have stopped.
London's Docklands area is now home to a temporary Covid-19 hospital.
Travel restrictions and growing costs mean hundreds of foreign travellers are unable to get home.
On Radio 4 Today some of BBC News' best known voices offer favourite poems of #comfortandhope and talk about the importance of the words in their lives.
Food writer Jack Monroe has been sharing top tips for people who are new to cooking.
Irish artist Will Sliney is keeping thousands of kids entertained with daily drawing challenges.
Sara, a mother of two from Greater Manchester, has lost her job because of the coronavirus crisis.
Housing Secretary Robert Jenrick said it was a move that was "unprecedented" in peacetime.