Could the "words of war" between Kim and Donald be the oldest political trick in the book: rhetoric designed to show the folks back at the ranch that there's a tough guy in charge, boost ratings and cover up shortcomings on the home front (Talking the world into nuclear war, The world, August 13)? As David Pratt points out, watch for US civilians packing their cases in Seoul and Guam, then make for shelter. Theresa May is silent for obvious reasons and many Tories still live the glory of Waterloo. Ruth Davidson would not sit on a gun barrel had she ever been under fire.

Any escalation might well involve Coulport. Without being alarmist, these are dangerous days. No Corbyn sitting on fences. Scotland must react now before the job goes wrong: independence minus Trident.

Iain R Thomson

Cannich

For health reasons, it is important that people know how much alcohol they consume, so to refer to "one drink (40 grams of alcohol)", is misleading (Is alcohol ruining your fitness?, Mind & body, Sunday Herald Life, August 13). One unit of alcohol, in an alcoholic drink in the UK, is defined as 10 millilitres, or 8 grams, of pure ethanol. The 40 grams of alcohol mentioned in the article is not so much a drink, as a night out.

David Muir

Edinburgh