evidence: Now that we are no longer part of the EU there are two things you need to look out for on a UK passport. [...] Your UK passport must be less than 10 years old on the day you enter your EU destination. For this you will need to check the ‘Date of Issue’ on your passport photo page. [...] It is important to note that if your passport was issued before 1 October 2018, extra months may have been added to its expiry date.