For many of us, summer means swapping the unpredictable British weather for sunnier skies, whether that involves a family holiday in Spain, a Greek island escape or a few days exploring one of Europe’s great cities. But as millions of UK travellers prepare to head abroad, there is one part of the journey that could prove rather less relaxing: getting through the airport.

With the EU’s new Entry-Exit System introducing biometric checks for British passport holders, there have already been warnings that queues at some European airports could become significantly longer..