I've written a new blog on the Brexit White Paper on the BMJ website. You can read it here. As you will see, I was quite amazed that any government would have the audacity to produce such an appalling document and pass it off as a something as serious as a government White Paper. It adds almost nothing to Theresa May's Lancaster House speech, contains factual errors, and includes no serious analysis of the challenges ahead. It has all the realism of a 5 year old writing to Santa Claus.
Others have noted how, by reading the metadata on the HTML version, one can see that it was only finished at 4 am in the morning it was published. One feels that it may only have been started the evening before.
Those wanting to read more (and after reading the White Paper, anyone with even a passing interest in Brexit is likely to want much more) should also look at Steve Peer's excellent analysis here. There is also a great thread by on twitter by Schona Jolly, another perceptive observer of these things.