They Shall Not Grow Old: parents' guide

Real footage and photographs of dead and wounded soldiers, many mangled or rotting, with bloody wounds, insects on corpses, and frostbitten, gangrenous feet. Shelling and gunfire throughout, plus graphic spoken accounts of combat and death.

Mostly mild British terms such as bloody, bugger, bastard, bitches, piss, damn and hell, largely in the veterans' recollections. One detailed guide counted a single f-word, while two others report only mild language.

Veterans describe going to brothels on leave, illustrated with suggestive period cartoons of women, and an old song has comic innuendo. Brief non-sexual rear nudity, including soldiers relieving themselves at a makeshift latrine.

Soldiers are shown smoking and drinking beer in the footage, and veterans tell stories about drinking, carousing on leave and the cigarettes they smoked. No drug use.

Sustained images of real death, disease and misery in the trenches, along with many spoken accounts of men being killed. Veterans also recall boys lying about their age to enlist, a reminder of how young many soldiers were.