The Prime Minister will attend a meeting of the UK's emergency response group tomorrow ahead of a press conference where he is expected to announce a new range of coronaviruslockdown measures.

Boris Johnson and his Cabinet were briefed on the spread of coronavirus and its economic effects on Saturday and the Cobra committee will be convened on Tuesday, Downing Street said.

Senior ministers were briefed by Professor Chris Whitty, Sir Patrick Vallance and chief economic adviser at the Treasury Clare Lombardelli, No 10 said.

The Prime Minister's official spokesman said: "The PM has been engaged with the Cabinet throughout this process.

"The Cabinet received a detailed briefing from the Government's chief medical, scientific and economic advisers over the course of the weekend.

"The PM will work with his colleagues to ensure that we respond in the most effective way to try to control the spread of the virus and to save lives."

Boris Johnson will address the nation this week after his Health Secretary warned the country was at "tipping point"

A calling notice for a meeting of the Cobra committee has been sent.

"Cobra will take place tomorrow morning," the spokesman added.

It follows concerns raised by Chief Medical Officer Chris Whitty and Sir Patrick Vallance, who addressed the nation live on Monday.

Infection rates are currently doubling within a 7 day period, Sir Patrick Vallance said, as Mr Whitty warned "the seasons are now against us."

Mr Whitty said Britain will feel the brunt of the virus for the next 6-months at least and dismissed claims the virus is weaker than it was in April.

Boris Johnson is expected to give a major update on TV later this week where it is likely he will impose harsher coronavirus lockdown rules.

Boris Johnson is expected to give a major update on TV later this week

England-wide restrictions "on the table" include a ban on households mixing, a curfew on pubs and harsher for those who flout the law.

Any national restrictions would be a big change for the Prime Minister - who wanted to rely on local lockdowns to control the virus.

However, Sir Vallance said on Monday that he believes, like Spain and France, the UK will see a rise in cases and therefore, "sadly," a rise in deaths.

He added all age groups have seen a rise in the number of cases, and the surge is not limited to one group, which is not a result of more testing, but more infection.