The World Taekwondo Council-Scotland is the umbella organization for all the martials arts programs offered at the Traditional Martial Arts Institute as well as other Clubs throughout the UK.

GM Harrell has had only one Okinawan Shorin-ryu Karate teacher, Frank Hargrove, 8th Degree Black Belt, Kyoshi. He has trained under his direct supervision since 1973.

Mugairyu Iaihyodo was founded in 1693 by Tsuji Gettan Sukemochi.

Although the Study Group no longer has any affiliations with the branch headed by Niina Gosoke, Grand Master Harrell was in fact taught by Niina Gosoke.

The World Koryo Gumdo Association is an organiztion that provides intruction in the Korean Sword Art form of Gumdo.