As for him being terrified when his brother screamed at him, nonsense, now, being screamed at by a Regimental Sergeant Major, right in your face would be terrifing, been there, done that.
The Infantry Training Centre Catterick (ITC Catterick) trains all Infantrymen joining the British Army. Recruits joining any of the Infantry Regiments, including The Footguards, The Parachute Regiment and The Brigade of Gurkhas undertake all their initial training at ITC Catterick.
They complete the relevant Combat Infantryman's Course, which represents their combined Phase 1 and 2 training. The 2nd Infantry Training Battalion (2 ITB) at ITC Catterick is responsible for soldiers under training (SUTs) joining any of the five Regiments of Footguards, The Parachute Regiment or The Brigade of Gurkhas.