As of Jan. 18, 2020, there have been no new changes regarding the travel plans for U.K. citizens to the EU. But if the U.K. leaves the EU with no deal, travel rules to the EU, Switzerland, Norway, Iceland or Liechtenstein will change. Things you may need to do before you go include: check your passport; get travel insurance that covers your healthcare; check you have the right driving documents; organize pet travel and contact your vet at least 4 months before you go You may need to renew your British passport earlier if you’re traveling after Brexit. On the day you travel, you’ll need your passport to both: have at least 6 months left; be less than 10 years old, even if it has 6 months or more left; if you do not renew it, you may not be able to travel to most EU countries and Iceland, Liechtenstein, Norway and Switzerland. For more information, check the following website: https://www.gov.uk/visit-europe-brexit
According to the Gov.uk website, new rules will apply for travel to Europe if the U.K. leaves the EU without a deal. U.K. citizens are being advised to have at least six months left on their adult or child passport when traveling to most countries in Europe (not including Ireland) after the U.K. leaves the EU. It is advisable to renew your passport before traveling if you do not have enough time left on your passport.