The Proceedings of the LMS/EPSRC Durham Symposium on “Higher Structures in M-Theory” have now been published in Volume 67 of the journal Progress of Physics (link here). The volume is edited by Branislav Jurčo (Charles University, Prague), Christian Saemann (Heriot-Watt), Urs Schreiber (Czech Academy Sci), and Martin Wolf. A link to the introduction is here.