Capital and other major cities often have a long history as important centres of economic and political power, trade, science and learning, cultural innovation and influence. As a consequence, many today embody a rich legacy of human creativity and achievement, a fascinating heritage which is not always immediately apparent to the casual observer. This is particularly true of our microbiology heritage. London, though not unique, has a particularly rich and varied history illustrating the interactions between microorganisms and humankind. In this series, Martin Adams, a connoisseur of London and its amazing microbiological heritage, reveals the beauty, ugliness, curiosity, surprise and, above all, the historical impact of London’s Microbiota. Let’s discover the fascinating world of London’s microbiology history and its relevance for our lives now through the brilliant Martin Adams, master of words and consummate humourist.