I guess that settles it for me. The author's notes are enough of a difference to get this if I come across it (and it's not unreasonably highly priced), as far as I'm concerned. Thanks for the photos and info, Dante! =)
Dante, I'm just wondering if you have any idea *why* this edition happens to include the author's notes from the Rare Edition? They strike me as a rather curious thing to include in an edition designed to introduce the series to new readers - they're primarily concerned with retroactively making TBB work better as part of what came later, not to mention that several references in them (such as the survivor of the fire and foreshadowing of the then-unwritten Book the Thirteenth) have dated quite badly.
Given all the books in this range "include new bonus material with information about the author and their works", they must have been in a bit of a bind for this one, given that this is the only one (of the initial six mentioned in the Bookseller article linked to) written by an American author, and also the only one written by a fictional character (although I'm curious as to if the Snicket interview is new, or recycled from elsewhere). Is it possible they simply happened upon the Rare Edition notes somewhere on Egmont's server, ascertained they hadn't been in any previous UK edition and added them in without any thought as to what new readers would make of them?
I think that's more or less exactly what Egmont did; they needed some fresh material, determined that they had the rights to the Author's Notes, and inserted them without running an expert's eye over how well they really functioned as an introduction to new readers. It is possible there had been demand for access to them in the past which they had registered, and I do think it's positive to finally have them available in print to U.K. readers; but I think that as a fan and a collector, not as an ASoUE novice. As for the interview, it has a number of commonalities with things Handler's said in the past, but I think it is new (though I don't have time to check thoroughly at present).
I wonder how they became aware of the existence of the Author's Notes, given they were well over a decade old at that point. (It's silly, I know, but there is an intriguing mystery to it.) If there were requests from UK fans to see them, how likely is it those would have been still on Egmont's mind in 2016?
I agree that it's unlikely, but nonetheless there must have been some consideration. Maybe they went trawling around specifically for bonus material from American rereleases of TBB? Or perhaps it was something they already had on file (whether by default or through having logged demands back at a more relevant point in time) but had yet to find a suitable opportunity to employ.