When there's a sustained and consistent fall in daily death rates to be confident the UK is beyond the peak
Once data from Sage shows the rate of infection is decreasing to manageable levels around the country
When testing capacity and PPE is sufficient enough to meet future demand
When experts are confident that any adjustments to the current measures would not risk a second peak in infections
When NHS’s ability to cope is protected and experts are confident that the NHS is able to provide sufficient critical care across the UK
Elsewhere, a growing number of countries are working towards easing restrictions with caveats including insisting the public wear masks outside, to the use of apps to trace those who may be carrying .
Here's how measures are being lifted around the world.
Anyone venturing out on to public transport must wear a mask - and the same face covering rules apply to most shops from this week.
How strict the rules are vary between states - for example, masks are not compulsory in shops in Berlin but are in Bavaria.
Homemade cloth masks are acceptable in most regions but there are vending machines at many transport hubs dispensing washable masks for commuters wanting to use trains and buses.
New Zealand is preparing to ease rules on a strict lockdown with certain businesses such as construction allowed to reopen from midnight on Monday.
Prime Minister Jacinda Ardern has announced a partial reopening of the economy, with social distancing measures remaining in place.
More than one million Australians have downloaded an app designed to accelerate contact tracing for coronavirus.
Within 12 hours of the Covidsafe app becoming available on Sunday, 1.13 million of Australia's population of 26 million had downloaded it, despite some privacy concerns.
Government officials intend to rush legislation through Parliament to outlaw use of collected data for purposes other than tracing people who might have the virus.
But the government says at least 40 per cent of the Australian population needs to take up the technology for it to be effective.
The country is now looking at reopening schools as the number of cases begins to tail off. Prime Minster Chung Sye-kyun has instructed education authorities to prepare measures to ensure hygiene and enforce distance between students at schools.
The government plans to announce a timeline for reopening schools no later than early May.
The easing of lockdown measures in the US is largely split along partisan political lines.
Governors in states including hard-hit New York and Michigan are keeping stay-at-home restrictions in place until at least mid-May, but officials in places such as Georgia, Oklahoma and Alaska are already allowing certain businesses to reopen.
The US has the highest number of Covid-19 cases out of any country worldwide.
*Italy: ITV News Europe Editor reports on how the southern European nation is breaking its lockdown *
Once the epicentre of Europe's Covid-19 outbreak, there are some encouraging signs coming from Italy as the country recorded the lowest daily death rate since mid-March.
Premier Giuseppe Conte has now laid out a timetable for getting back to normal, following seven weeks in strict lockdown.
Factories, construction sites and wholesale supply businesses can start up again once safety measures are in place against the virus.
From May 4, parks and gardens will reopen, funerals will be allowed, athletes can resume training, and people will be able to visit relatives living in the same region.
If all goes well, stores and museums will reopen on May 18, with restaurants, cafes and salons to follow on June 1.
A detailed plan for the "de-escalation" of Spain's strict coronavirus lockdown will soon be presented by the country's Prime Minister Pedro Sanchez.
Children under 14-years-old are now allowed to take walks with a parent for up to one hour and within one kilometre from home.
From Friday, this will be relaxed further to allow people of all ages to go on walks or exercise outdoors.
The government in the Czech Republic is now allowing stores with a floor surface of up to 26,900sq ft to reopen.
Restrictions have been lifted to allow zoos and botanical parks, fitness centres, and driving schools to all reopen.
Rules on social distancing and mandatory face masks remain in place but public gatherings of up to 10 people are now allowed - an increase from two.
In a boost for the country's economy, the three Czech Skoda Auto factories that belong to Germany's carmaker Volkswagen have renewed production, the company employs some 34,000 people.
Coronavirus: Everything you need to know