The Manual is written by the European working group Fire and Explosions and gives the directions for Fire Investigations. The manual is now under public review and deadline for comments is set to the 10th of September 2020. Take the chance and comment - the manual and directions for the review can be found here.
If you want to now more about ENFSI (the European Network of Forensic Science Institutes) you can read more about here and learn more about the organizations with 39 countries as members.