I was one of the 56 academic supporters of the Trade Justice Movement to sign a letter criticising the UK Government for so far refusing to stipulate how post-Brexit trade deals are to receive the assent of Parliament. The letter was published on October 20th 2017.

It can be found here, albeit quite a long way down on that day's published list of letters: http://www.telegraph.co.uk/opinion/2017/10/20/lettersif-brexit-negotiations-fail-big-risk-comes-staying-eu/.