You can't move for commentary on Ivan Rogers resignation currently, but it's worth reading his resignation letter in full, as it reveals a number of startling facts about the state of our Brexit negotiations.
Among other things, he highlights how woefully outmatched the UK is when it comes to negotiating experience in comparison to Brussels, and takes a not so subtle dig at the team at Number 10, interpreted by many as a broadside at Theresa May's closest adviser rather than the Prime Minister herself.
Most startling, and concerning, is the following sentence of his resignation:
Just think about that for a second.
Until yesterday, Sir Ivan was the most senior diplomat the UK had in Brussels. He was the man who led David Cameron's renegotiation, and was due to kick off the initial negotiations with the European Union when the UK triggers Article 50 sometime before the end of March. And yet here he reveals that even he does not yet know the objectives of the renegotiation. And his use of words is important. He's not saying they don't have a concrete road map, or that they don't yet know the minutiae of what deal the UK will seek. He reveals that the overall objectives are totally unknown to even the most senior members of our negotiating team.
Whatever your view of the European Union, or of Brexit itself, it should concern everyone, on every side, that we're 10 weeks away from starting the most complex set of diplomatic negotiations in generations and we apparently haven't decided what we want to achieve yet.