If you're heading to Europe this summer, prepare for queues caused by the EU's new Entry/Exit System (EES) - or it could end up costing you more than just your patience.

UK travellers now have to register fingerprints and a photo when scanning their passport as part of EES. The extra time required, plus some technical glitches, have led to long delays at airports. Some holidaymakers have missed flights and had to buy new tickets.

Here are three things experts say you must do before traveling to Europe to avoid additional costs.

First, build in plenty of time. The UK boss of budget airline Wizz Air told the BBC that British holidaymakers should arrive at European airports three hours before their flight home departs. Jet2 and Ryanair suggest the same, depending on the airport. Eurostar advises arriving at the station at the recommended time on your ticket, as it already accounts for EES. At the Port of Dover, technology issues have prevented the system from being used; it advises arriving no more than two hours before departure, warning that arriving too early could cause queues.

Second, check for updates. Airlines and travel providers send messages about waiting times and changes, so sign up for them. The Civil Aviation Authority says airlines typically notify passengers of significant delays and advises checking directly with your airline before heading to the airport. Download airline apps in advance and ensure emails don't go to your junk folder.

Third, understand your insurance - or lack thereof. If you miss your flight due to EES queues, airlines are under no obligation to rebook you for free. Travel insurance is unlikely to cover the cost, says the Association of British Insurers. Anne Robinson and her 13-year-old son Jack missed their flight home from Rome in June after a 90-minute queue, paying £250 for a replacement flight two days later - which they couldn't claim back. No policies explicitly cover EES delays because it's an expected procedure, explains Anna-Marie Duthie of Defaqto. There's a slim chance of a claim under missed departure or delay cover, but immigration delays are often excluded. Read your paperwork or speak to your insurer before you travel.