The UK National Exercise of the IGNIS Project was held on 12th to 16th June 2017 at Northumberland Fire and Rescue Service’s Headquarters. This was the last of four national simulation (virtual reality) exercises designed and delivered during the IGNIS Project. The UK exercise was designed and delivered by wildfire and incident command specialists from Northumberland Fire and Rescue Service, with the guidance and assistance from colleagues working within the IGNIS Project partner organisations and the IGNIS Project Independent Advisory Board. This report provides a comprehensive overview of the design, planning and implementation of the UK exercise. The report also concludes with some key findings and recommendations for improving future simulation training exercises.