The WTO is based in Switzerland. At times it's hard to know when you're crossing the border between an EU country and Switzerland, despite Switzerland never having been an EU member, and having different currency, laws, tax regime, and so on to the adjacent EU countries.
Interestingly, the head of the Swiss Customs Service gave evidence to Westminster's Northern Ireland Affairs Committee last year and explained how it would be possible to maintain an invisible border after Brexit.
Of course, remain supporters won't like this - why should we take any notice of the head of the Customs Service of a non-EU country that has very soft borders with the EU? Obviously he doesn't know what he's talking about!
Interestingly, the head of the Swiss Customs Service gave evidence to Westminster's Northern Ireland Affairs Committee last year and explained how it would be possible to maintain an invisible border after Brexit.
Of course, remain supporters won't like this - why should we take any notice of the head of the Customs Service of a non-EU country that has very soft borders with the EU? Obviously he doesn't know what he's talking about!
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