Meridian CPD (FistralAI Ltd, trading as Meridian CPD) produces online continuing professional development courses for domestic energy assessors and retrofit professionals across England, Wales and Scotland. Every course is written from primary sources, meaning the legislation, government guidance and scheme rules themselves, then independently checked, dated and referenced so the learner can see what it was checked against and when. Courses are delivered as visual slide decks with written notes and completed online. Each completion is recorded and the learner receives a certificate of completion that can be verified at a public link. Topics cover energy assessment, insulation, heating, ventilation and moisture, with courses re-checked and republished when the rules change. Courses are sold individually, as short series, or by annual subscription.