If Hay is that most English of festivals, then hearing John Julius Norwich talk about his "dear papa", the late Duff Cooper - statesman, ambassador, biographer, poet and bon viveur - is like drinking a G&T, listening to Radio 4 and complaining about the weather (in this case because it is stiflingly hot). Throw in a bobby on a bicycle and a vicar making tea for a village cricket team, and you get the picture.