'In a 2016 poll, one in 10 Britons claimed to have experienced the presence of an angel, while one in three remain convinced that they have a guardian angel. These are huge numbers and mean that, on some counts, angels are doing better than God.'

In the secular, sceptical, post-Christian world of the West, continuing faith in angels is both anomaly and comfort. But what exactly are angels, and why have so many in different times and contexts around the globe believed in them? What is their history and role in the great faiths and beyond their walls? Are angels something real, a manifestation of divine concern? Or part of the poetry of religion? And can they continue to illuminate a deeper truth about human existence and the cosmos?

These are not new questions. They have been asked over millennia, right up to the present day, as writer, journalist and broadcaster Peter Stanford explores in Angels, his latest investigation into the history, theology and cultural significance of religious ideas.