The United Grand Lodge of England	http://www.ugle.org.uk
The Provincial Grand Lodge of Yorkshire North and East Ridings	http://pgl-york.org
Library and Museum of the United Grand Lodge of England	http://freemasonry.london.museum
The Grand Charity	http://www.grandcharity.co.uk
The Royal Masonic Trust for Girls and Boys	http://www.rmtgb.org
The Royal Masonic Benevolent Institution	http://www.rmbi.org
The New Masonic Samaritan Fund	http://www.nmsf.org
Canonbury Masonic Research Centre	http://www.canonbury.ac.uk
Sheffield University Centre for Masonic Research	http://www.shef.ac.uk/~crf/
Quatuor Coronati Lodge of Research	http://www.quatuorcoronati.com
The Cornerstone Society	http://www.cornerstonesociety.com
Freemasonry Today	http://www.freemasonrytoday.com
MQ Magazine	http://www.mqmagazine.co.uk
The Initiates Club	http://www.initiatesclub.co.uk/