Article by Thomas Sampson: Why will Brexit cause problems at the border? Let’s start with the basics. The central issue is that currently, goods move freely between the UK and other EU countries. That’s part of being a member state: you get “frictionless trade” with other countries in the bloc. But Brexit will be the end of this. In future, customs checks will be required on UK-EU trade, imposing a new administrative burden on British importers and exporters.

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