In this paper, and drawing on the work of Martha Fineman and others, we deploy a vulnerability lens as an heuristic device to push against the concept of professional lawyer independence as enshrined in statute and promoted by legal services regulators. Using interviews with 53 senior partners and others from 20 elite law firms, we show how the meaning and practice of independence are profoundly mediated by the contexts, relationships and interactions of corporate lawyers’ everyday working lives. Vulnerable to competition from other firms, the demands of clients, the shift over time from ‘trusted advisor’ to ‘service provider’, regulatory requirements, pressures to make profit and so on, these corporate lawyers appeared prone to developing and normalising potentially risky and irresponsible practices. We therefore argue that a debate about corporate legal regulation is better based upon a richly theorised concept of inter-dependence which takes seriously the causes and effects of practitioner vulnerabilities in particular circumstances.