All or Nothing?

The European Commission is presenting a plan to fully reopen to Covid vaccinated foreign tourists from June (https://www.theguardian.com/world/2021/may/03/eu-plans-to-reopen-to-fully-covid-vaccinated-foreign-tourists-from-june). This seems, at first sight, welcome news for UK folk desiring a European 'foreign' holiday. Not so fast! An EU official has warned that the UK will only get a 'green light' for its tourists if it shows 'a reciprocal willingness to open its borders to all EU citizens'. This seems improbable, as many EU countries are unlikely to make the UK's own 'green list'. It will be interesting to see whether such an 'all or nothing' arrangement holds.