Pub goers could be asked to provide a vaccine certificate, Boris Johnson has told MPs, saying it “may be up to individual publicans”.
A review is looking into whether people should have to prove they have been vaccinated, as lockdown measures ease.
A government source told the BBC that the option of allowing people to show a negative test was also being looked at.
But Tory MP Steve Baker said it was a “ghastly trap” and unfairly penalised those advised not to have a vaccine.
Meanwhile, MPs will vote later on new coronavirus laws for England’s roadmap out of lockdown.
They will also be asked to approve the government’s plan to renew emergency coronavirus powers for another six months. The Coronavirus Act was introduced in March 2020 at the start of pandemic.