Both England and Scotland have announced delays to the loosening of Covid measures due to rising coronavirus cases driven by the Delta variant (formerly known as the Indian variant).
Wales and Northern Ireland are yet to announce if they will delay the easing of restrictions there.
So, what are the current plans in each of the home nations?
Despite the delay, Boris Johnson announced that the limit of 30 people at weddings and wakes will be lifted. Capacity will instead be dictated by the number of people a venue can hold while maintaining social distancing.
From June 21, residents in care homes who have to isolate after a trip away will no longer have to do so. At the moment, it looks like most restrictions will end around July 19, as that is four weeks from June 21. However, there will be another review from the UK government in two weeks time which could see restrictions end earlier on July 5. Johnson said the link between cases and hospitalisations has been "weakened" but not completely broken, so more time must be given to get more people vaccinated.
Most of Scotland moved into level one on June 5 which meant people were allowed to meet inside cafes, pubs and restaurants in groups of eight as restrictions eased across the country.
But a number of areas stayed in level two after seeing a spike in coronavirus cases.
Under level one rules, people can meet outdoors in groups of up to 12 adults from 12 households, the number of people allowed at weddings or funerals rose to 100.
But the two-metre social distancing between households remains in place, and people are being urged to work from home where possible.
Nightclubs and adult entertainment venues remain shut.
Small seated indoor events are permitted up to a maximum of 200 people.
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Glasgow, Edinburgh, Midlothian, Dundee, East Dunbartonshire, Renfrewshire, East Renfrewshire, North, South, and East Ayrshire, North and South Lanarkshire, Clackmannanshire and Stirling remain in level two.
Level two restrictions means people can meet in homes in groups of no more than six, from a maximum of three households and can also travel from outside their local authority area to other parts of the country.
Pubs, restaurants and other hospitality venues can reopen for drinking indoors while a number of venues are allowed to reopen and outdoor adult contact sports can start again.
Shetland, Orkney and the Western Isles council areas will move to level 0, allowing larger groups to meet in a private residence and adult contact sport to return.
Pubs and other hospitality venues can shut under their local licensing laws, rather than abiding to a national curfew.
The maximum attendance at weddings and funerals will be 200 – rather than 100 at level one and 50 at level two.
People can meet indoors in groups of up to four households.
First Minister Nicola Sturgeon is set to provide an update to the Scottish Parliament on Monday, June 21 where she will set out whether any further easing of restrictions can go ahead.
June 28 was the initially scheduled date for a country-wide move to level 0, but Sturgeon has now said that after this date the country is "likely" to maintain Covid rules for three more weeks.
From June 7, gatherings outdoors with up to 10,000 people seated or up to 4,000 people standing have been allowed.
Extended households can be formed between three households.
Up to 30 people can meet in any outdoor area, including private gardens, public spaces and outdoor regulated premises such as cafes, restaurants and bars.
Wales has adopted the same traffic-light approach to international travel as the rest of the UK.
Social distancing remains in place and face coverings are required in many indoor situations.
Lockdown measures in Wales will be reviewed on June 21.
In Northern Ireland, June 21 was also set to see a big step towards easing of Covid restrictions. Subject to June 17 review, from June 21, 10 people from two households can meet in private homes, or up to 15 if a household has more than six members.
Up to 15 people from any number households can meet outdoors in a private garden while live music will be allowed at "ambient levels" - but still no dancing.
If the data allows, theatres will reopen and concerts restart.