This paper examines the ethical issues which arose as part of a qualitative study with children who had experienced sexual abuse and the implications of these ethical issues for the methodology and conduct of the study. The ethical dimensions addressed include protection of the therapeutic relationship, anonymity, confidentiality, safeguarding (child protection), consideration of the sensitivity of the issue, informed consent, the right to withdraw and storage of data. The study formed one component of a service evaluation of a network of therapeutic projects provided by Action for Children, offering interventions for trauma following child sexual abuse. Children and young people's perspectives were collected using a child-friendly activity book designed to elicit their views on the service. The paper highlights the importance of conducting research which adheres to ethical guidelines and reflects upon the process of designing a study which incorporates them. (Published Abstract)