So this is Brexit?

This we have known since his WA was signed but it is worth spelling out at this moment exactly what it means, because most media coverage is not doing so, or at least not in sufficiently stark terms: leaving the single market and customs union has been achieved for Great Britain only by breaking up the single market and customs union of the United Kingdom.

https://chrisgreybrexitblog.blogspot.com/2020/12/so-this-is-brexit.html