There are a couple of photos of Scarlet Pimpernel on my site - perhaps you missed them as it's listed under 'Pimpernel, Scarlet' rather than the other way around. The photos aren't great, it's a flower that my camera always seems to struggle to focus on for some reason. It certainly is a lovely little flower - I have now seen it many times along field paths that I've walked here in the Chilterns.
WAB volunteers are supposed to help out around WAB whenever they can. I haven't really been asked to do anything though. To become a volunteer just go to control on your WAB toolbar and click on Social groups then you'll see WAB volunteers and just click join group. hope this helps :D