The Hastingses have idyllic lives but, like most seventysomethings, we find ourselves in ever-closer proximity to mortality. We hold season tickets for hospital and care-home visits, funerals and memorial services. Prostates are a staple of dinner-party conversation. We have not got quite as far as the 94-year-old contemporary of the painter Raoul Millais, who quavered in the churchyard after the two had bidden farewell to a friend: ‘Hardly worth you and I going home from here, is it, Raoul?’ But we are mindful of La Rochefoucauld’s observation that compassion represents the intelligent anticipation of one’s own troubles to come.