DexterTCN
Troy and Abed in the morning
Decent article, doesn't go very in-depth but does outline the difficulties.This article reckons a no deal crash-out is the most likely outcome.
Crash Out Brexit Now the Defender Position | naked capitalism
And of course this is only about NI where RoI has a veto, there's still Gibraltar where Spain has a veto and everything else to be dealt with.