 :Thanks for your note - yes, I see what you mean - but I'm still not sure that the bit you quoted is completely clear! In context it could be read as a description of how to disambig one Bt from another. I suppose I also have in mind guidelines favouring simple page titles. Anyway, as long as things are clear for the reader, it doesn't matter much. And thanks for catching the birthday - don't know why I hadn't included it first time round. 