This Christmas, for perhaps the first time ever, Britain is a majority non-religious nation. Most of us have probably seen this moment coming, but it is a substantial event nonetheless. It is undoubtedly a development that would have astonished our ancestors who built a Britain on the basis that we were and would remain a predominantly Protestant people. The victory of secularism would have flabbergasted them almost as much as the pope appearing on the BBC with his Thought for the Day.