If the UK leaves the EU on 29th March 2019 guidelines are emerging.
Holidays; package holidays are being recommended. Customers will be recompensed if the flight doesn't take place. If someone has booked their hotel/car hire separately they will not be recompensed by the airline if the flight isn't delivered.
Insurance; apparently some people rely on their right to be treated in the EU if they have existing medical conditions or fall ill. They can't rely on this continuing, so will need to be insured.
Passports; The EU passport will no longer be accepted, so a British passport with any visas necessary should be obtained. The fast track entry for EU citizens will not be available. Those with an Irish passport will be OK. The best position is for those with both British and Irish passports. They can leave the UK via fast track using their British passports, and enter an EU country via the fast track channel using their Irish passports.
Driving; an international driving licence will be needed. There are two kinds and people will need one or both depending on which countries they plan to visit.
Mobile phones; cheap roaming may or may not continue; check with your provider.
