The sigma Accessibility SIG is the special interest group of the sigma Network (http://www.sigma-network.ac.uk/sigs/accessibility-sig/). This mailing list is to facilitate sharing of information on access to mathematics and statistics in the British Isles. Membership is not confined to sigma Network members. This group was originally AccessMSORWG, the Higher Education Academy Maths, Stats and OR (MSOR) Network Subject Centre's Accessing MSOR Working Group (AccessMSORWG). The MSOR closed in 2012. This list continued as a network of people with expertise and interest in areas relating to access to mathematical and statistical content for disabled students. The sigma Network has assisted in ensuring that some former MSOR Network structures persist and this group is now one of them.