In a speech at Lancaster House on January 23, UK Trade Secretary Kemi Badenoch outlined five priorities for trade. The UK joining would fundamentally change the CPTPP, which is currently about 12 percent of global gross domestic product (GDP). The UK joining the CPTPP would make it a global agreement – a global plurilateral agreement that would include pro-free trade countries. The UK joining would fundamentally change the CPTPP, which is currently about 12 percent of global gross domestic product (GDP). The UK joining the CPTPP would make it a global agreement – a global plurilateral agreement that would include pro-free trade countries.