Originally Posted by
ScienceTeacher
UK passports no longer add on previous validity.
many passports are still out there that still have the added validity - and there will be until 2028! . Mine issued in 2010 expires in mid 2021 because I had 9 months added on.
For future EU travel I need to exclude those 9 months to get a 'correct' expiry date.
In any case the UK will still be in the EU on 31st October (we will leave at 23.00) so the existing rules will apply for UK passports and any 180 days validity won't apply.
There is a handy passport validity checker on the uk.gov website.