You really couldn't make this up. It would seem that MP's may be asked to vote on Teresa May's Brexit deal without having access to the financial details in the impact assessments.

How utterly stupid that would be. Not only do the government seem terrified of letting us voters have details but terrified on even letting our elected representatives have the facts.

https://www.theguardian.com/politics/2018/aug/28/no-deal-brexit-no-10-refuses-to-say-mps-will-see-full-impact-analysis

I think this is referred to as the Mushroom System of goverment.