There are two classes of membership:
'Members of the company' whose right vote is enshrined in UK law, and 'Associative members' who engage in all associative activities but are not entitled to vote. 'Associative members' are members who are working in the London or Dublin office (both salaried staff and volunteers). 'Associative members' can opt to become 'members of the company' when they leave either the London or Dublin offices.