Background: Many people with intellectual disabilities are affected by death, yet conversations about death are often avoided by staff working with them. This study aimed to assess staff training needs and to develop, trial and evaluate a training course on communicating about death and dying. Method:(i) Semi-structured interviews with 20 staff in residential/supported living services to establish training needs; (ii) three-one-day courses were attended by 114 staff and evaluated through questionnaires. The course consisted of World Café sessions, presentations and feedback by people with intellectual disabilities, and an expert teaching session. Results: Staff fear, cultural influences and inexperience with death-related conversations were major communication barriers. Evaluation of the course was overwhelmingly positive. Conclusions: Intellectual disabilities services must have clear staff training strategies around death, dying and communication. More work is needed to assess the resource implications and impact on practice of different training methods and other support strategies.