Boris Johnson has unveiled a new slogan ahead of his big speech to the nation tonight as the government shifts its messaging in the battle against Covid-19.
The government is planning to urge workers who cannot do their jobs from home to begin returning to their workplaces while following social-distancing rules.
After the bluntness of the shutdown message of "stay at home, save lives, protect the NHS", Britons are now set to be asked to "stay alert, control the virus, save lives".
The Government's new slogan has been devised by Isaac Levido, an Australian strategist, and Ben Guerin, 25, from New Zealand, who advised the Tories on their social media strategy during last year’s election.
Andy Burnham, the Labour Mayor of Greater Manchester, tweeted that it "feels to me like a mistake to me to drop the clear" stay at home message.
Dave Ward, general secretary of the Communication Workers Union, said: "The messaging from this Government throughout this crisis has been a total joke, but their new slogan takes it to a new level."
He wondered: "Stay alert? It's a deadly virus not a zebra crossing."
Writer and comedian Adam Kay added that it would be "difficult to stay alert to something that's 0.0001 millimetres in diameter.
"This pandemic is going to have as many spikes as a coronavirus".
The Prime Minister is also expected to unveil a coronavirus warning system when he outlines his plans to gradually ease the lockdown.
A new five-tier alerts system, similar to a scheme used to publicise terror threat levels, will be used to flag up any coronavirus risk.

Alerts will range from level one (green) to level five (red) and Mr Johnson is expected to claim England is on the verge of moving from four, the second highest level, to three.
Once it is at three, it means the infection rate is not increasing rapidly.
The system will be managed by a Joint Biosecurity Centre, which will be responsible for detecting local spikes of coronavirus enabling ministers to increase restrictions where needed in its fight reduce infection rates.
This comes after the Bank of England warned the nation was on course for its sharpest recession on record.
Despite the Government encouraging employees to return to work Grant Shapps, the Transport Secretary, warned that social distancing rules means that when the UK transport networks returned to operating at full capacity just only one in 10 passengers would be able to travel, to minimise the risk of transmitting coronavirus.

Mr Johnson's "roadmap", which aims to get the country back to normal, is staggered over the next six months but he said some steps will happen on Monday “if we possibly can”.
While gyms aren't expected to open until at least October, Brits will now be able to exercise as much as they like outdoors from Monday.
Employees at businesses that have stayed open throughout the lockdown will be able to return to their workplaces - providing it's safe.
Garden centres could also reopen, while restrictions around open-air markets and high streets could be eased which allow traders resume with guidance from the Government.
They will also issue guidance surrounding funeral burials and visiting cemeteries.
The Government 's draft 50-page blueprint for easing the coronavirus lockdown will be rolled out in five staggered steps between Monday and October.