Have found a neat Excel formula so have put together some stats on the Cambrian series rides from 2008 onwards (effectively when I took them over). There have been 243 brevets issued and 117 rides completed. The events waiting a completion are:
3D, 4A, 4D, 4E, 4F, 4G, and 6A (although there is an attempt happening very soon on the 4G). I rode the 4D in 2006 and the 4F and 4G have effectively been ridden as together they make up the 8A.
The most popular events by completion are the 2B (38 completions - although a high proportion of these are by one rider), 1B (12 completions), 2A (12 completions)
The 3A is the most popular longer ride (6 completions) - although there are a quite a few brevets out there not completed - remember there is no time limit on the cards - if you have one I've sent out you can use it whenever you like (up until I give up organising).