Prime Minister Boris Johnson will soon approve the plan to uplift almost all legal restrictions on social contact in England on 19 July.
But before the news conference on Monday afternoon, Mr Johnson has asked people to be cautious.
“We must all take responsibility so we don’t undo our progress, ensuring we continue to protect our NHS,” he said.
He cautioned that Covid-19 cases, presently at about 30,000 a day, would continue to persist as society reopened.
The PM’s news conference will declare the latest data. Downing Street is saying present modelling suggests hospital admissions, severe illness, and deaths from Covid-19 will linger, but at a lower level than before the vaccination programme.
Number 10 said the postponement in moving to the final stage of the roadmap out of lockdown, initially planned for 21 June, had permitted an additional 6.8 million first and second vaccine doses to be given out so far.
The government had also encouraged the probable end of restrictions closer to the school summer holidays when communication was likely to be lower, Downing Street said.
Mr Johnson stated, “We are tantalisingly close to the final milestone in our road map out of lockdown, but the plan to restore our freedoms must come with a warning.”
He said the vaccine roll-out had faded the link between infections, hospital admissions and deaths, but also added the pandemic was “not over yet”.
With cases set to increase as restrictions were lifted, “caution is absolutely vital”, the prime minister mentioned.
As well as the news conference, Health Secretary Sajid Javid is likely to announce the plans in Parliament.