Thanks JSanders. I was actually looking at the various options for these as you posted
I will definitely get something. I did try using the holster that came with the BB, but found that it made it so much more bulky, and was a pain to keep taking the thing in and out of the holster.
I may even take the BB to a camera shop after work (Jessops I've heard good things about) to see if they can advise about the mark, and to see if they sell screen protectors.