After nine European nations listed India's Covishield vaccine on their travel guidelines list, UK PM Boris Johnson said there was no reason why people who received Indian-made AstraZeneca COVID-19 vaccines should be left out of vaccine passport schemes.

PM Johnson backs India's Covishield vaccine in European Union travel schemes

The EU is at an advanced stage of talks with the US over mutually recognising vaccine passports to boost transatlantic tourism this summer.

EU in vaccine passport talks with US but not UK

Tourist-reliant southern European nations such as Greece and Spain are urging the rapid adoption of an EU-wide certificate for travellers to show they have been vaccinated.

EU leader divided over 'Vaccine Passports'