Ministers are due to finalise details of a series of “travel corridors” so people arriving into the UK on certain routes will not need to quarantine.
Most of Western Europe is due to be on an initial list of exempt countries.
The countries expected to be exempt include France, Italy, Spain, Greece, Belgium, Germany, Norway, the Netherlands, Turkey and Finland.
Portugal will probably not be included after a rise in the number of new cases in and around Lisbon.
Sweden is also unlikely to be on the list because the infection rate there is higher than in the UK.
A travel corridor would mean that two people travelling in both directions between two countries would not have to self-isolate after they travel.
The initial list of destinations exempt from the quarantine is expected to take effect early next month. Work is also on-going to see if a travel corridor is possible with Australia.
The quarantine will remain in place for people arriving from other countries and it’s thought that might be the case for some destinations throughout the summer.
The government has previously said that the quarantine would be reviewed every three weeks and 29 June marks the end of the first three-week period.
The first travel corridors could come into force on 4 July, although that date is by no means confirmed.
Transport Secretary Grant Shapps had indicated there would be an announcement on Monday. But the BBC understands that initial details could be unveiled this weekend.
What are the current quarantine rules?
- People arriving in the UK should drive their own car to their destination, where possible, and once there they must not use public transport or taxis
- Arrivals must not go to work, school, or public areas, or have visitors – except for essential support. They are also not allowed to go out to buy food, or other essentials, where they can rely on others
- Those arriving in England, Wales and Northern Ireland could face a fine of £1,000 if they fail to self-isolate for the full 14 days, while they face a £480 fine in Scotland.
- The maximum fine for repeat offenders in Scotland is £5,000.