Effective Altruism Global - London

For highly engaged members of the effective altruism (EA) community and covers many topics including animal welfare with a focus on using evidence and reason to implement the most high impact interventions to reduce animal suffering. There is a large emphasis on 1:1 networking and usually at least a couple of animal welfare talks and meetups. There are other such conferences (including smaller EAGx conferences) which may be worth going to if they are local to you.