In October 2013, the European Union adopted a Directive, which guarantees, inter alia, the right of access to a lawyer to suspects of criminal offences from the outset of police custody and during police interrogation. However, adoption of the relevant legislation is not sufficient to ensure that this right becomes effective in practice. A range of practical measures will have to be taken by the Member States’ authorities and the legal profession to effectuate the implementation of the right to custodial legal advice. This article aims to identify the practical factors that may influence the implementation of the Directive, based on the findings of a recent normative and empirical study conducted by the authors. The research was carried out in four European jurisdictions (England and Wales, France, the Netherlands and Scotland), and it consisted of analysis of regulations, observations of daily practice in police stations, accompanying lawyers who provided custodial legal advice, and interviews with criminal justice practitioners. The article provides a range of recommendations on the practical measures to be undertaken by the EU Member States and national Bar associations aiming at improving the protection of suspects’ rights in police custody in practice.