The situation with COVID will get worse before it gets better, and cases “will increase dramatically,” medical officials warned.
The Academy of Medical Royal Colleges said that people should be cautious and take steps such as wearing face covers in congested indoor spaces.
It warned that the NHS was under first-time pressure.
On Monday, the government is likely to confirm whether the easing of measures in England will continue on July 19.
The UK is seeing a sharp increase in the number of cases, according to the Office for National Statistics while Health Secretary Sajid Javid has earlier said that he would expect the number of infections to reach around 50,000 new cases per day.
On Saturday, the UK recorded 32,367 new cases and 34 deaths within 28 days of testing positive.
It is the fourth consecutive day that the number of cases exceeds 30,000, while on Friday, the highest daily figure since January 22 was recorded.