I’m reading an Ian Rankin novel, Saints of the Shadow Bible. The dialogue runs along the lines: ‘It was thirty years ago, Siobhan. Everything was…’ He turned towards her. ‘Is it fair to bring it up?’ …Tell that to Oliver Letwin, I thought. Most people harboured similar suspicions in those days. It took television shows such as the Huxtables to help persuade otherwise, though that too now seems tainted.