The fourth chapter provides the first detailed data on the demography, geography, and viewpoints of the UUP membership. The chapter examines if the UUP is still in any way the party of ‘Big House’ unionism, one with a more middle-class membership, or with members enjoying higher incomes, than those belonging to the DUP. The chapter profiles the party base in terms of when members joined—and why. This section assesses where the UUP, traditionally strong in middle-class areas and in rural parts of Northern Ireland, such as Fermanagh, continues to attract members. It then considers members’ views of their own political positions and those of their party in terms of left–right distinctions, support for political institutions, and policy preferences.