Boris Johnson has said that the UK government is considering whether to introduce so-called “vaccine passports”.
After a desperate, deadly year of coronavirus, the UK's vaccination programme has delivered first doses to 15 million of the oldest and most vulnerable.
Scientists behind the Oxford AstraZeneca vaccine say it should still protect against the worst potential consequences of Covid, after a study suggested it had a limited effect against the South African variant of the disease.
More than 10 million people across the UK have received at least one vaccination for coronavirus as part of the biggest programme of its kind in the history of the National Health Service.
Should the UK rethink its strategy to stop the spread of Covid-19?
The three Covid-19 vaccines, that have been approved in the UK, are from Pfizer-BioNTech, the University of Oxford and Astra-Zeneca and Moderna.