I couldn’t believe it. I was trying to discuss traditional marriage – and the state was trying to stop me. Incredible, in a 21st-century European country, but true. I was invited to speak at a conference on marriage last summer, to be held at the Law Society in London. The government had just launched a public consultation on changing the law to allow same-sex marriage. The conference was a chance for supporters of traditional marriage to contribute to the debate. The participants included a retired philosophy professor, a representative of the Catholic archdiocese of Westminster, the chairman of the Tory...