Boris Johnson is expected to unveil a traffic light system for foreign travel in an update on measures for easing Covid restrictions in England.
The prime minister is to make a series of announcements on changes to the rules at a Downing Street briefing.
More detail might be given on the possible use of Covid certificates as well as on international travel.
Mr Johnson is first expected to meet the cabinet to sign off the next stage of easing the lockdown in England.
This will see non-essential shops reopen and pubs and restaurants start serving outdoors from 12 April.
Mr Johnson will be joined by chief scientific adviser Sir Patrick Vallance and England’s chief medical officer Prof Chris Whitty at the Downing Street briefing at 17:00 BST.
The government has also announced plans for everyone in England to be given access to two rapid coronavirus tests a week from Friday, in an expansion of its testing programme.
Currently foreign holidays are banned in the UK, with £5,000 fines in England for people trying to travel abroad without a good reason.
Under the current plan for easing restrictions, the earliest date people in England could go abroad for a holiday would be 17 May and the government’s Global Travel Taskforce is not due to report back until 12 April.