This page is for signposting initiatives/schemes I've come across over the years with a focus on EDIA in the mathematical sciences. I'd be grateful for any further suggestions!
Network which helps to overcome the gender imbalance in maths, with a focus on encouraging and supporting more women and underrepresented genders to pursue a PhD in maths.
Local committees across UK universities, and an annual PiFORUM conference
Resources: 'What can you do?' - practical guidebook with hints and tips on improving gender diversity in mathematical research, 'How to: Ace your PhD application' - useful info for students applying for PhD positions.
Various funding opportunities available, including the Inclusion and Diversity Fund and Caring Supplementary Grants
Good Practice Scheme to help maths departments take practical steps to improve diversity.
Support for events, e.g. Black Heroes of Mathematics conference
History for Diversity in Mathematics Network: focuses on ways in which history of maths can be used in teaching to promote better EDI practice in the maths curriculum in UK HE. Activities include a monthly reading group, and in-person workshops.
PhD Your Way: online annual event providing information about PhDs in maths
STARMAST: a fantastic resource bank with accessible, inclusive maths resources, created by both students and staff at the University of St Andrews.