Documentation

https://verfassungsblog.de/if-vote-leave-broke-the-law-could-brexit-be-void/

https://cpmr.org/cohesion/cpmr-analysis-uk-to-lose-e13bn-regional-funding-post-brexit/20525/?fbclid=IwAR3rutlnee6wejlLaLknxgyRwN6KdL9UqPBq3ob-9NyzMI_LsklbK9wZP9s

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/785962/190314_-_PARAMETERS_OF_EXTENDING_ARTICLE_50_-_FINAL.pdf

https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=OJ:C:2019:066I:TOC

A provisional version of the Withdrawal Agreement and the 25 November political declaration (PD) have been published in the EU Official Journal C series (link above).

The C series concerns "Information and Notices" i.e. non-binding texts. If or when the WA is concluded (ratified) and takes effect it would be re-published in the L series as a binding text ("Legislation"). This scenario does not apply to the PD.

Thanks to MarkJ

See also OJ index page, two columns

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/781768/Implications_for_Business_and_Trade_of_a_No_Deal_Exit_on_29_March_2019.pdf

Get Richard Corbett's app: Doorstep EU see https://www.richardcorbett.org.uk/app/

WTO just fine? think again - https://drive.google.com/file/d/1qOyv69Cn-5-OoQldwely301TWyj5heTZ/view

Lord Kerr's report on the roadmap to a People's Vote: https://d3n8a8pro7vhmx.cloudfront.net/in/pages/15721/attachments/original/1537281950/roadmap_pv.pdf?1537281950

So how ready are we for "no deal"? Not very: https://www.instituteforgovernment.org.uk/blog/uk-still-isnt-ready-no-deal-brexit

All DexEU publications - including the "technical papers": https://www.gov.uk/government/publications?departments%5B%5D=department-for-exiting-the-european-union

Institute of Government August 2018 Scenarios for the remainder of the time: https://www.instituteforgovernment.org.uk/sites/default/files/publications/brexit-scenarios-final_0.pdf

University of Sussex report on food implications of Brexit: http://www.sussex.ac.uk/spru/newsandevents/2017/publications/brexit-food-security

11 June 2018: The EU's rebuttal of the UK's ideas to deal with the Irish border: https://ec.europa.eu/commission/sites/beta-political/files/slides_on_uk_technical_note_on_temporary_customs_arrangements.pdf

CBI survey of business showing they are not at all keen to diverge from EU regulations. http://www.cbi.org.uk/insight-and-analysis/smooth-operations/

Definitive papers on how the EU works by the Senior European Experts (ie UK former civil servants and diplomats): https://senioreuropeanexperts.org/category/how-the-eu-works/

The Impact Studies - finally!

https://www.parliament.uk/documents/commons-committees/Exiting-the-European-Union/17-19/Cross-Whitehall-briefing/EU-Exit-Analysis-Cross-Whitehall-Briefing.pdf

http://ukandeu.ac.uk/wp-content/uploads/2018/03/Brexit-local-and-devolved-goverment-report.pdf

Brexit fact-base October 2017 update https://drive.google.com/file/d/0B9KyWRO_9pfzaFRnbzRSWEpZTnM/view

Legal Milestones on the Road to Brexit: The People’s Challenge Guide. updated December 2017 https://drive.google.com/file/d/1jvlo57BQSjD0PmLwDu9CV0YZeJV3seT4/view

AC Grayling's case - Parliament has not yet taken the decision to leave - https://www.prospectmagazine.co.uk/politics/mps-did-not-properly-approve-brexit-so-the-triggering-of-article-50-was-invalid

The bad boys of Brexit: https://badboysofbrexit.com/

and what some of them are frightened of: https://ec.europa.eu/taxation_customs/business/company-tax/anti-tax-avoidance-package/anti-tax-avoidance-directive_en

Brexit lobbying portal: http://powerbase.info/index.php/Brexit_Portal

Borders - European Parliament study Nov 2017: http://www.europarl.europa.eu/RegData/etudes/STUD/2017/596828/IPOL_STU(2017)596828_EN.pdf#page=36

The Bill formerly known as The Great Repeal Bill, (now the EU Withdrawal Bill)

external link to the Bill itself: