GeoEast: http://www.geo-eastevents.org.uk/
GIGL: http://www.gigl.org.uk/
Bucks Earth Heritage: http://www.bucksgeology.org.uk/
Kent RIGS: http://www.kentrigs.org.uk/
Natural England: http://www.naturalengland.org.uk
Geologists Association: http://www.geologistsassociation.org.uk
British Geological Survey: http://www.bgs.ac.uk
Harrow and Hillingdon Geological Society: http://www.hhgs.org.uk/
Essex Rock and Mineral Society: http://www.erms.org/
Open University Geological Society (London Branch – LOUGS): https://ougs.org/london/
Amateur Geological Society: www.amgeosoc.wordpress.com