More an FYI than anything else, but the Government has put out a 141-page "Partnership Pack" (their terminology, not mine) aimed at businesses, and explaining everything they know so far about what will change after a no-deal Brexit i.e. potentially as soon as 29 March 2019 at 11pm.
You can download the PP as a PDF from the link below:
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/776885/Partnership_pack_Feb_2019.pdf
There are several other documents that might also help if you're trying to figure out what's what. For instance, a step-by-step guide to what you will have to do to import goods from the EU after Brexit Day.
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/776631/Step_guide_to_importing.pdf
There is also an equivalent guide for exports.
assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/776632/Step_guide_to_exporting.pdf
Those are the big ones, but there are a number of other documents included in the collection, which you can explore at the link below.
www.gov.uk/government/publications/partnership-pack-preparing-for-a-no-deal-eu-exit
From a pragmatic point of view, more certainty is probably better than less. But they make grim reading, as there's new red tape left, right and centre, and lots of things that will potentially cost businesses money (e.g. engaging professional advisors, customs specialists and the like). So you may wish to keep a stiff drink handy.
Anyway, hope this helps some of you.