The last 10 years has seen explosive expansion of the number of centres performing cardiov- cular magnetic resonance (CMR) imaging. The majority of this expansion has been in the ? eld of adult ischaemic imaging, but congenital heart disease remains one of the main indications for CMR. Importantly, the greatly improved survival of patients with congenital heart disease gives us a burgeoning adult population living with the sequelae of the disease (grown-up c- genital heart disease - GUCH). Without previous experience or formal training, the interpretation of CMR images of patients with...