UK holidaymakers planning to travel to 30 European countries, including Spain, Greece, Portugal, and France, have been warned about confusion over rule changes that started to come into force on April 2. Since last week, the European Travel Authorisation (ETA) has been in force, meaning European citizens coming into the UK need a ‘pass’ to enter the country.

Similar rules are coming for UK travellers who want to get into 30 countries in Europe. While those rules, known as ETIAS, have been…