Boris Johnson has warned that Britons must follow the rules set out to curb the spread of coronavirus - or face further restrictions.

The Prime Minister was speaking during a live televised address to the nation on Tuesday night.

Mr Johnson said the country can “succeed” if everyone follows the Government’s strategy.

He said he was “deeply, spiritually reluctant to make any of these impositions, or infringe anyone’s freedom, but unless we take action the risk is that we will have to go for tougher measures later, when the deaths have already mounted and we have a huge caseload of infection such as we had in the spring”.

Mr Johnson added: “If we let this virus get out of control now, it would mean that our NHS had no space – once again – to deal with cancer patients and millions of other non-Covid medical needs.

“And if we were forced into a new national lockdown, that would threaten not just jobs and livelihoods but the loving human contact on which we all depend.

“It would mean renewed loneliness and confinement for the elderly and vulnerable, and ultimately it would threaten once again the education of our children. We must do all we can to avoid going down that road again.

Boris Johnson addressed the nation tonight following a string of new measures announced earlier today

“But if people don’t follow the rules we have set out, then we must reserve the right to go further. We must take action now because a stitch in time saves nine; and this way we can keep people in work, we can keep our shops and our schools open, and we can keep our country moving forward while we work together to suppress the virus.

“That is our strategy, and if we can follow this package together, then I know we can succeed because in so many ways we are better prepared than before.”

Earlier today Mr Johnson outlined a raft of new measures to Parliament.

Office staff will be asked to work from home, there will be wider use of face masks and a 10pm curfew on pubs and restaurants.

The PM said that the new curbs could continue well beyond Christmas and New Year “unless we palpably make progress” in controlling the spread of the virus.

As part of tougher enforcement measures, businesses will face fines or closure for failing to comply with coronavirus rules, and people will face £200 penalties for failing to wear masks where required or breaching the so-called “rule of six”.

The military could be brought in to free up police officers to tackle coronavirus rulebreakers, the Prime Minister said.

The new restrictions come as the number of confirmed coronavirus cases in the UK passed 400,000, with a further 4,926 lab-confirmed cases as of 9am on Tuesday.

The Government said a further 37 people had died within 28 days of testing positive for Covid-19 as of Tuesday.