Boris Johnson has changed the rules of the coronavirus lockdown, and is now encouraging certain people to return to work.

Previously the government had said people should "only go to work if you must" - if you're an essential worker.

But it is now changing the "emphasis" of the advice so that anyone who cannot work from home is being actively encouraged to return to work from Wednesday.

This includes people who work in construction or manufacturing, or other fields where remote working is not an option.?

People are still, however, being urged to avoid public transport wherever possible, and drive, walk or cycle to work instead.

Social distancing measures should be followed in the workplace to ensure that employees remain at a safe distance from each other.

The details are unclear but are expected to be fleshed out in a 50 page guidance document at 2pm today.

Mr Johnson didn't specify if it was UK or just England... but Nicola Sturgeon made clear Scotland weren't being asked to come back to work

In his speech last night, Mr Johnson also just said the rules would change "this week" which most viewers took to mean Monday.

However, Foreign Secretary Dominic Raab has this morning clarified it kicks in from Wednesday.

You can still only send your children to school if you are a key worker - so it is unclear what happens with childcare to people being asked to return to work.

There has been much criticism of Johnson's decision to encourage people to return to work so suddenly.

Labour leader Keir Starmer said the PM "appears to be effectively telling millions of people to go back to work tomorrow" without the necessary guidance.

He added: "We haven't got the guidelines, and we don't know how it's going to work with public transport so there's a huge number of questions arising out of this."

John Phillips, acting GMB General Secretary, pointed out that many people don’t have the luxury of being able to avoid public transport.

He said: "Employers who now see a green light to operate will expect their employees to come in - what happens if they can’t do so without public transport?

“Given workplace standards haven’t been published yet, how are employers supposed to know what to do to make workplaces safe?

"We all want to get back to normal but we have to think of this in terms of the real lives and challenge of the people who will be asked to go to work.”

Richard Jones, Head of Policy and Regulatory Engagement at the Institution of Occupational Safety and Health (IOSH), said that health and safety must come first.

"People shouldn’t re-enter workplaces until employers are certain that they’re properly managing the risk of infection and providing the support that workers need.

"Prevention has to be the focus because, if organisations don’t get this right, workplaces can become places of transmission."

He suggested that occupational safety and health professionals would have a key role in helping to design new processes, such as staggered shift patterns to support physical distancing or improved ventilation and hand and respiratory hygiene.