You wouldn’t believe why my grandson doubts my sanity. · ‘What did you do in the war, granddad?’ · I looked down at my grandson, about to snap, ‘I’m only 68, not 98!’ and then realised, to an eight-year-old, anyone passed middle age must be ancient and had to have fought at Trafalgar. · His question, I suppose, arose from all the news about Dunkirk on the television. · The end of General Patton’s speech on the war came back to me but I quashed…