The usual excuse for regulation is the failure of market provision. This paper examines legal services and suggests that, in the case of provision of commercial legal services to corporate clients, true events of market failure, to support the case for regulation, and more particularly self-regulation, are hard to locate. It further argues that the market for legal services is heavily stratified with a commercial legal services market effectively operating quite separately to that of professional legal services for private clients. In consequence, it may be more effective and proportionate to adopt differentiated strategies of regulation. This might be achieved by shifting the focus of regulation away from the individual practitioner, as is historically the case, towards law firms as such. This simple step, it is suggested, could facilitate much greater liberalisation of the market for legal services. This proposal is explored with particular reference to freedom of services within the European single market and, as a backdrop to the paper, progress to date in facilitating cross-border legal services in Europe is reviewed.