SCBWI (Society of Children's Book Writers & Illustrators). Join for regional events, agent parties, discounts & support.
WriteMentor provides mentoring, competitions, online workshops and 1-2-1 agent meets for childrens, MG and YA writers.
Golden Egg Academy supports children's writers with manuscripts, networking and inspiration from professionals
Curtis Brown Agency run creative writing courses and competitions led by agents
Society of Authors: support for authors & writers