The Health Research Authority (HRA) has outlined new legal requirements for clinical trials coming into force in spring 2026. The regulations will make it mandatory for researchers to register trials in public registries, publish results within 12 months of completion, and share findings with participants in an accessible format. The HRA reports current voluntary registration compliance at 92%, with commercial trials showing higher rates than non-commercial studies. The authority is developing guidance with the Medicines and Healthcare products Regulatory Agency to support implementation, including provisions for exemptions in cases such as national security.