NHS Covid Pass
UK residents vaccinated abroad or in Northern Ireland can now use England's NHS Covid Pass if they have received two doses of an approved jab.
It means those eligible will also be able to arrange a booster in England.
Previously only those who had the jab in England, Scotland, Wales or the Isle of Man could use the pass to prove their vaccination status.
From Wednesday people in England will need to use the pass to gain entry to nightclubs and other large venues.
The four jabs approved by the UK's medicines regulator are AstraZeneca, Pfizer, Janssen and Moderna.
Changes to who can use the NHS Covid Pass were introduced on Thursday, a day after the prime minister announced it would become mandatory for some venues in England.
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To register an overseas vaccination, people must book an appointment at a selected list of vaccination centres in England.
Details will then be recorded in the National Immunisation Management System.
International Covid certification accepted at the UK border is also accepted at events and venues in England, the government said.