http://fedtrust.co.uk/our-work-on-europe/there-may-be-trouble-ahead-brexit-after-the-election/
https://institute.global/news/the-inbetweener-brexit
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/682894/Draft_Text_for_Discussion_-_Implementation_Period__1_.pdf
http://www.conservativehome.com/platform/2017/05/neale-richmond-no-deal-between-britain-and-the-eu-would-be-a-disaster-for-ireland.html