A four-stage plan could see coronavirus restrictions finally lifted by June 21, Boris Johnson has announced.
In the first phase, all pupils in England's schools are expected to return to class from March 8.
Socialising in parks and public spaces with one other person will also be permitted from that date.
A further easing of restrictions will take place on March 29 when the school Easter holidays begin - with larger groups of up to six people or two households allowed to gather in parks and gardens.
Other measures in the road map set out by the Prime Minister include:
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- From April 12 at the earliest: shops, hairdressers, nail salons, libraries, outdoor attractions and outdoor hospitality venues such as beer gardens will reopen.
- From May 17 at the earliest, two households or groups of up to six people will be allowed to mix indoors and limited crowds will be allowed at sporting events.
- From June 21 at the earliest, all remaining restrictions on social contact could be lifted, larger events can go ahead and nightclubs could finally reopen.
Alongside the four-step plan, the Prime Minister launched a series of reviews - including on whether people should be able to show if they have had a Covid-19 vaccine or a negative test.
The work will look at whether "Covid status certification" could help reopen the economy by allowing people who have received a jab or a negative test result to do things which would not be allowed for those who could not prove their status.
Officials recognise that there are moral and ethical questions as well as practical ones for any such move, which has been highly controversial in Westminster.
A research programme will use pilot schemes involving testing and other measures to run events with larger crowd sizes.
International travel rules will also be reviewed, with May 17 targeted as the earliest possible date for a foreign holiday.
A further piece of work to conclude by June 21 will examine social distancing requirements - including hugs with friends and relatives - the use of face masks and requirements to work from home.
The measures are expected to be put to a commons vote before the house rises for Easter in late March.
Making a statement in the commons, the prime minister acknowledged "the threat remains substantial" with the numbers in hospital only now beginning to fall below the peak of the first wave in April.
Modelling by the Sage scientific advisory panel showed "we cannot escape the fact that lifting lockdown will result in more cases, more hospitalisations and sadly more deaths".
"And this would happen whenever lockdown is lifted - whether now or in six or nine months - because there will always be some vulnerable people who are not protected by the vaccines.
"There is therefore no credible route to a zero Covid Britain, or indeed, a zero Covid world and we cannot persist indefinitely with restrictions that debilitate our economy, our physical and mental wellbeing and the life chances of our children."
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