http://ecipe.org/publications/the-uks-first-international-trade-negotiation/?chapter=all
https://publications.parliament.uk/pa/cm201719/cmselect/cmintrade/520/520.pdf
https://www.socialeurope.eu/2017/06/stronger-pay-increases-are-not-enough/
https://fullfact.org/europe/how-many-free-trade-deals-has-eu-done/