In Sidney Lumet's autobiography "Making Movies", the director recalled suffering through the horrendous heat of the location and asking Sean Connery if he was urinating at all, to which Connery's reply was "Only in the morning".
The five prisoners are members of the following regiments. (All identifiable via their cap-badges.) McGrath: Lancashire Fusiliers. King: Royal Pioneer Corps. Bartlett: Royal Fusiliers (KC). Stevens: Royal West Kent Regiment. Roberts: Royal Tank Regiment.
The Sergeant Major and his two Staff Sergeants, Wilson, Williams, and Harris, are members of these three regiments respectively: Scots Guard, East Surrey Regiment and Royal East Kent Regiment (A.K.A. "Buffs")
For the Almeria set, located in a sandy wasteland called Gabo de Gata, the punishment hill was constructed, utilizing 10,000 feet of imported tubular steel, and more than sixty tons of stone and timber.