I hadn't intended to write about war songs this week. But I was struck by some of the responses to yesterday's D-Day special, and, as always, impressed by the resilience of the accompanying music. It's eighty years since June 6th 1944, four score and six since the first troops shipped out, and yet that sound remains unmistakeable. For those who were there, a few bars of "White Cliffs of Dover" will always mean a crowded railway platform in East Anglia as the troop train pulls out, and a snatch of "Maybe It's Because I'm a Londoner" will always evoke the...