I know I have kept you waiting, but here is a picture of what I broke:
Luckily for me I was changing it for a higher powered energy saving bulb, so I wasn’t in the dark for too long. There isn’t too much need to fear for the earth as I am still using less energy than the original bulb that was there by a considerable margin.
The only thing that concerned me when picking up the pieces was that even after gathering the pieces together it still looked like I was missing a few pieces. So far though the walk around barefoot method of glass detection has failed to produce any results, so it would seem I was worrying needlessly.
So there you go Rich, you need wonder no more.