The prime minister will hold a 5pm news conference today after he chairs a virtual meeting of the COVID-19 Operations (COVID O) committee, which formulates and advises Mr Johnson on coronavirus policy.
He will brief the full cabinet on the arrangements for the latest phase of lockdown lifting in England ahead of the news conference.
The second step of the roadmap out of lockdown is meant to start on 12 April and will see non-essential shops, hairdressers and beauty salons reopen.
Outdoor hospitality can also reopen, with the rule of six or a larger group from two households, and self-catering holidays in the UK with your own household allowed.
As part of the roadmap, there is a minimum of five weeks in between each step - four weeks for the scientific data to reflect the changes and to be analysed, followed by a week's notice of which restrictions will be eased.
Mr Johnson will announce a system for "COVID-status certification" which could allow people to return to sporting fixtures, theatres and other public events.
People who have been vaccinated, have had a recent negative test or natural immunity based on a positive test in the previous six months, could be allowed to attend venues.
Pilots will take place from mid-April to trial the system at nine events, including Liverpool's Hot Water Comedy Club, the World Snooker Championship in Sheffield, Liverpool's Circus nightclub and the FA Cup semi-final and final at Wembley.
The prime minister will also reveal details about a traffic light system that will be introduced when international travel is allowed to resume - from 17 May at the earliest.
Passengers travelling from countries in the green category will not need to isolate on their return, but pre-departure and post-arrival tests will be needed.
People arriving from red and amber countries would still need to quarantine.
The Global Travel Taskforce, which was assessing how overseas travel could restart, said it is too early to predict which countries will be on that list.
Mr Johnson is also expected to talk about the twice-weekly rapid COVID tests everyone in England will be expected to take from Friday to prevent outbreaks.