https://publications.parliament.uk/pa/cm201719/cmselect/cmhaff/421/421.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/635900/2017-08-07_DP_Bill_-_Statement_of_Intent.pdf
https://www.gov.uk/government/uploads/system/uploads/attachment_data/file/640485/Technical_note_on_Functionality_and_Protocol_7.pdf
https://www.lrb.co.uk/v39/n18/swati-dhingra/how-not-to-do-trade-deals