EU a brexit - https://www.consilium.europa.eu/cs/policies/eu-uk-after-referendum/

http://researchbriefings.files.parliament.uk/documents/CBP-7960/CBP-7960.pdf

VB - https://www.theweek.co.uk/100284/brexit-timeline-key-dates-in-the-uk-s-break-up-with-the-eu

https://www.bbc.com/news/uk-politics-46393399

https://ttf.co.uk/wp-content/uploads/2019/09/CPA-Brexit-Update-September-2019.pdf 

https://www.express.co.uk/news/politics/1173807/brexit-timetable-what-happens-next-now-boris-johnson-no-deal-brexit-delay-general-election