The evidence is in. Tourism in Europe is eating itself. The combination of cheap airfares, Airbnb and motorised caravans means that everywhere you always wanted to go is full and getting fuller by the minute, like the bin bag in a student kitchen.

And it’s not just in mid-summer that stasis has taken hold. You can’t move in the Louvre or the Uffizi in any month of the year. If you want to look out over Paris from the top of the Eiffel Tower or gain entry to the Sagrada Familia or wonder at the splendours of the Sistine Chapel, be prepared to grow old in the attempt.