<Tr> <Td> Andorra </Td> <Td> Agreement in the form of an Exchange of Letters between the European Economic Community and the Principality of Andorra--Joint Declarations </Td> <Td> 1 January 1991 </Td> <Td> Excludes agricultural products </Td> </Tr> <Tr> <Td> San Marino </Td> <Td> Agreement on Cooperation and Customs Union between the European Economic Community and the Republic of San Marino </Td> <Td> 1991 </Td> <Td> </Td> </Tr> <Tr> <Td> Turkey </Td> <Td> Decision No 1 / 95 of the EC - Turkey Association Council of 22 December 1995 on implementing the final phase of the European Union--Turkey Customs Union </Td> <Td> 31 December 1995 </Td> <Td> Excludes agricultural products </Td> </Tr> <P> While all EU member states are part of the customs union, not all of their respective territories participate . Territories of member states which have remained outside of the EU (overseas countries and territories of the European Union) generally do not participate in the customs union . </P>

When did the uk join the customs union