https://blogs.spectator.co.uk/2019/09/ivan-rogers-the-realities-of-a-no-deal-brexit/
Agree with a lot in that blog.
A bit repetitive, but some things need repeating. Too much good stuff to quote chunks but here's one gem...
"No amount of repetition of ‘this will all be terribly easy’ ever makes it true. It is not unpatriotic or ‘declinist’ to point out that a process of ‘differential disentanglement’ – which is actually what Brexit is – will be hard, complex and lengthy. How, seriously, after more than three years can so much of our political elite still be in denial on this?"
I'd include the political elite on this thread!