Richard Lockyer has written 76 articles that appeared in Gibbons Stamp Monthly over the years. These articles were copied by Richard with permission from GSM and are now available on a one page web site index that I set up for him.
If you collect King George VI issues, you might want to take a look at the site. We are still adding copies of the articles, so bookmark the page and check back. I am uploading them as Richard sends them to me.