The Adult Congenital Heart Disease (ACHD) population is growing and there is a vital need for Physiologists and Cardiologists with the skills to echo these complex patients and support ACHD services. However, ACHD echo can seem daunting and overwhelming without prior training in this area. Oxford ACHD Echo was set up in 2020 by Dr Joanna Lim to help address this need. It began with monthly teaching sessions for the Cardiac Physiologists in the Thames Valley region. The audience has grown nationally such that we had over 500 attendees join our live on-line teaching programme in 2022-23, which was endorsed by the British Society of Echocardiography. The 2024-2025 programme consists of 12 live teaching sessions run once a month on-line and available for catch-up viewing afterwards. Each hour-long session focuses on a particular congenital lesion. The anatomy and physiology are described in a clear, accessible way, and a practical assessment framework for each lesion is presented. Key slides and resources can be accessed via our free website oxfordachdecho.org. Our aim is to open up the exciting world of ACHD echo to those without prior experience or training in this area. We hope you will join us for this session on pulmonary hypertension.