
There’s a point that Boris Johnson and his inner circle are fond of making about the United Kingdom, the European Union and Ireland, and it doesn’t prove what they think it does.
Their point is this – that there is nothing in the Good Friday Agreement about customs checks or regulatory arrangements. Dominic Cummings has said it on his blog, and many of Johnson’s closest allies have said it privately. Johnson’s big Brexit letter alluded to it, referring to his commitment to “longstanding areas of UK/Ireland collaboration, including those provided for in the Belfast (Good Friday) Agreement, but also in some cases predating the European Union”.