The EU has pledged to "find a way" to make its digital green pass work for countries and regions outside the bloc.
The union’s digital Covid pass will allow people travelling within the EU to verify their Covid status through certification of Covid vaccination or immunisation, or a negative Covid-19 test result.
Earlier this month, Portugal’s tourism secretary Rita Marques said it would reopen to Brits in May on the basis of the green pass system.
It comes after the EU said it would be open to involving third countries, like the UK, in the scheme.
Following a meeting with the UN World Tourism Organisation this week, European Commission vice-president Margaritis Schinas said Europe was ready to find ways to make the green pass "work" with other countries’ Covid protocols.
"Europe is part of the world, and we are ready find a way that the European green pass works with solutions provided by countries or groups of countries from outside the EU," said Schinas.
She also reiterated the pass would be ready to reopen tourism in mainland Europe this summer, and stressed reopening borders would "drive Europe’s overall recovery".