Valleylyn sorry for the late reply! I live in Coventry, England and we're currently receiving heavy rainfall, a lot more than we should be at this time of the year. Our temperatures don't seem to be going any lower than 4C either so we haven't really had much of a winter but some of the sedums have died back and the flowers can no longer be seen.
I can definitely see the two different sedum albums, at first I just thought it had discolored due to the weather. Yes, I did think that was sedum acre too so thank you very much!
gg5 thank you, I hope it's still there when I go back on the roof this Saturday seeing as we haven't really had a proper winter yet.