
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/650455/customs_bill_white_paper_print.pdf

http://www.japantimes.co.jp/opinion/2017/05/15/commentary/world-commentary/france-great-britain-unbeatable-combination/#.WTqNinm1s2x

https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/994125/FINAL_TIGRR_REPORT__1_.pdf