Vaccine passports will be required for those attending nightclubs, music venues, festivals and sports grounds in England under the Government's autumn and winter contingency Plan B.
The proposal will only be introduced if the country faces a difficult winter with rising Covid cases in the colder months, the Government said.
It said on Monday it was confident Plan A would prevent the NHS from facing unsustainable pressure, but published its Plan B saying if it was needed, it would have to act quickly and adopt measures like vaccine certification at short notice.
A further 40 people had died within 28 days of testing positive for Covid as of Monday, bringing the UK total to 136,208, and there had been a further 37,960 lab-confirmed cases.
The Plan B proposals draw on the findings of a review into vaccine passports earlier this year, which concluded that certification could help keep events going and businesses open.
They set out how all visitors aged 18 and over to certain events could be required to be fully vaccinated.
Nadhim Zahawi today confirmed vaccine passports will be required to gain entry to large venues, arguing the documents are the 'best way' to avoid winter closures
Weekly Covid deaths in the UK breached 1,000 in mid-September for the first time since March, official figures revealed today.
This was the highest weekly toll since the week ending March 12 (1,637), when the devastating second wave was beginning to recede. The figure includes any fatalities with Covid mentioned on the death certificate, including cases where it was not the main cause of death.
Meanwhile, official data also