Nightclubs and other large venues in England will only be open to fully vaccinated people from September.
Prime Minister Boris Johnson, speaking on Monday (July 19), said:
"I don't want to have to close nightclubs again as they have elsewhere. But it does mean nightclubs need to do the socially responsible thing.
"As we said last week, we do reserve the right to mandate certification at any point if it's necessary to reduce transmission."
Venues will be legally required to enforce certification checks once all over 18s have been offered both jabs.
Sacha Lord, Night Time Economy Adviser for Greater Manchester, said he was "deeply concerned by the discriminatory nature" of Johnson's announcement.
People who are unable or unwilling to get the vaccine would potentially be shut out of live music venues, theatres, large bars and arenas, Lord added.
"Let's not let the Government hide behind the narrative of nightclubs."