David Bowen performed a Web Site Inspection in the Financial Times, in which he compared the "Open Government" approach of the American intelligence
community with the closed world of British spookdom. The second paragraph mentions this site.
It appears that there are very few sites with material information on SS/SIS, which leads to this site's descriptions of those agencies being frequently linked to by other persons' pages. Perhaps there is an irony that American agencies which have much more capability appear to be more transparent than British agencies which have much less.