>>941422Like is it common knowledge because it's been published in books like this which became popular, or was it always common knowledge, which is why it makes it into books like this.
I don't really know anything about the SAS but I'm assuming they're an elite group picked out of the regular corps who would have already gone through survival training. I don't have the book in front of me now and haven't for years, but I remember it being all sort of fire/shelter/trap type stuff which would be week one in even a basic survival course.
Seemed unlikely to me that an elite group would be at that level.