There are loads of resources out there in the form of web sites, books, courses and much more. Below are some of the ones we think are most useful for those wanting to learn more about permaculture.
http://norfolkpermaculture.wordpress.com - A web site with details of all permaculture happenings around Norfolk
https://www.permaculture.org.uk - The web site of the Permaculture Association of Britain
https://www.permaculture.org.uk/land - Information about permaculture demonstration sites around the UK
http://permacultureprinciples.com - Full of free resources about the ethics and principles of permaculture
http://permanentpublications.co.uk - An amazing range of permaculture books and other resources
http://www.permaculture.co.uk - The UKs regular permaculture magazine. We recommend you sign up!
Earth Care Manual by Patrick Whitefield - often referred to as the bible for permaculture in temperate climates
A Designers Manual by Bill Mollison - often referred to as the bible for permaculture
Permaculture Design by Aranya - a great resources with step by step guides to each stage of the design process
People and Permaculture by Looby McNamara - permaculture beyond the garden
Soil and Soul by Alastair McIntosh - a book that has inspired us, not specifically about permaculture but well worth reading
One Straw Revolution by Masanobu Fukuoka - like Zen and the Art of Motorcycle Maintenance for Permaculture