The rail routes a St Pancras upgrade could open up – if there were fewer hurdles
Efforts to smooth cross-border train travel might improve the experience, but direct services from London to Switzerland or Germany are a long way off
Read MoreEurope's most picturesque seaside towns you can reach by rail
Try a no-fly escape, with scenic Spanish resorts, heritage-filled French promenades and sandy Dutch and Belgian beaches among the mix
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