https://www.theguardian.com/politics/2017/sep/04/uk-trade-deals-after-brexit-theresa-may-eu
http://www.wsta.co.uk/images/Brexit/Brexit_FINAL.pdf
https://assets.publishing.service.gov.uk/government/uploads/system/uploads/attachment_data/file/868378/200227_UK_trade_in_Numbers_full_web_version_final.pdf
https://gcaptain.com/china-europe-rail-lines-supply-china/?subscriber=true&goal=0_f50174ef03-401209d0eb-170450703&mc_cid=401209d0eb&mc_eid=4069c37bba