The Twenty-Sixth British Combinatorial Conference was held at the University of Strathclyde in Glasgow in July 2017. The British Combinatorial Committee had invited nine distinguished combinatorialists to give survey lectures in their areas of expertise, and this volume contains the survey articles on which these lectures were based.

In compiling this volume, we are very grateful to the authors for preparing their excellent surveys so professionally, and to the anonymous referees for their detailed and timely responses. We would also like to thank the team at Cambridge University Press, in particular Roger Astley, Clare Dennison and Abigail Walkington, for all their assistance and advice. Finally, we could not have completed this task without the experience of the editors of earlier volumes of Surveys and the guidance of the British Combinatorial Committee.