Any objective assessment of the UK's membership of the European Union requires consideration of potential alternative relationships. Options include relationships based on those Norway and Switzerland have with the EU — neither are members but they both enjoy varying degrees of access to the single market.

CBI analysis, drawing on interviews with a wide range of Norwegian and Swiss stakeholders, clearly shows that such forms of associate membership are not easy options that simply allow a country to gain the advantages of membership while removing the disadvantages. Rather these models offer different combinations of costs and benefits. The CBI rejects the premise that these models would be better options for the UK.