Groups of up to six people will be allowed to meet up together outside in private gardens from Monday, the Prime Minister has said.
Boris Johnson said it would mean that for the first time since lockdown measures came into force on March 23, people will be able to see both their parents, or grandparents, at once.
The PM said those from different households would also be able to meet, as long as gatherings totalled no more than six.
But he said strict social distancing rules would still apply.
People should remain two metres apart from others they meet.
Mr Johnson said the announcement for many would be a 'long awaited and joyful moment'.
The easing of lockdown restrictions on meeting others was announced today at the daily coronavirus press conference at Downing Street.
But those with acute health issues who have been asked to shield must continue to do so, the PM said.
Previously, people could meet one other person from another household in public areas like parks, with social distancing in force.
Mr Johnson also warned over 'seeing people from too many households in quick succession'.
The PM said: "I know the toll the lockdown has taken on family and friends who have been unable to see each other.
"So from Monday we will allow up to six people to meet outside provided those from different households continue strictly to observe social distancing rules by staying two metres apart.
"At the moment, people can meet in parks but not in private gardens.
"This was a cautious first step.
"We know there is no difference in the health risk.
"We will now allow people to meet in gardens and other private outdoor spaces.
"These changes mean friends and family can start to meet their loved ones, perhaps seeing both parents at once or both grandparents at once.
"I know for many people this will be a long awaited and joyful moment.
"But I must stress that to control the virus everyone needs to stay alert, act responsibly, strictly observe social distancing rules and stay two metres apart from those you do not live with.
"Minimising contact with others is still the best way to prevent tramsmission.
"You should also try to avoid seeing people from too many households in quick succession so that we can avoid the risk of quick transmission from lots of different families and continue to control the virus.
"It remains the case that people should not be inside the homes of their friends and families, unless it is to access the garden.
"At this stage those who have been asked to shield themselves should continue to do so.
"I want to thank you for all the efforts you have gone to."
Mr Johnson said the Government was 'looking carefully' at those with acute health issues, and said a further announcement would be made shortly.
