In the aftermath of Exercise Watermark, the Environment Agency were tasked with undertaking a formal review of the exercise, covering all stages of exercise planning and play.
Yn sgil Ymarfer Watermark rhoddwyd y cyfrifoldeb i Asiantaeth yr Amgylchedd gynnal adolygiad ffurfiol o’r ymarfer, gan gwmpasu holl gamau cynllunio a gweithredu’r ymarfer.