Yes quite agree with your previous comments regarding the lack of books on insignia and Canadians in the British Security and Secret Intelligence Services and don't forget the BSC as well in North America as that was in joint operations with the SOE here too (Camp "X") Ajax,Ontario.
I am really looking forward to see more on this as it(Your future book develops etc,.)
Here's a few of the books that are in my collection as follows:
The Secret History of the "SOE" 1940-45 by William MacKenzie
Operation Jedburgh (Americans first secret war by Colin Beaven)
The Jedburghs, Secret history of the Allied Special Forces in France 1944)
MI6 (Inside the secret world of H.M. Secret Intelligence Service) by Stephen Dorill.
Here's a link you may find very useful as it pertains to the "Jedburghs"
Excellents photo's of these unknown warriors......"