https://theherbarium.wordpress.com/ - An autonomous group of independent UK herbalists sharing knowledge and resources. Lots of info about herbal preparations, philosophy, regulations and law, links.
http://whisperingearth.co.uk/about/ - Website of herbalist, naturopath and nature lover Lucinda Warner. How to Make recipes and a Materia Medica.
http://www.purplesage.org.uk/ - Website of Christine HAughton, medical herbalist. Recipes, Materica Medica, Herb and Bookshop, Equipment
http://www.radicalherbalism.org.uk/resources/ - Fantastic gathering held once per year in the UK by the radical herbalism collective. Discussing the future of herbal medicine, healthcare, social justice, environmental issues. Skillshares, empowerment, networking, and generally support each other. Fun too!!