<<< I also believe the Gurkha's are the only Regiment other than the Household Guards to guard Buckingham Palace in modern times. >>>
You are quite correct.
Heard this from my father who was in the RAF during WW2 in Burma. Gurkhas used to do jungle patrols and if they found a camp with their sentries posted, they would crawl on their bellies up behind the sentries and run their fingers up the laces of the boots. If they were laced the wrong way, kukri came out and you were history. The Japanese were terrified of these brave soldiers.