The BBC's not so "secret" pronunciation guides

According to this morning's Telegraph a "secret guide that has helped generations of BBC newsreaders pronounce difficult words and odd-sounding names is to be made public for the first time." Now. I'm presuming they are talking about this, which is, indeed, a new publication.

However, the idea of BBC pronunciation is most certainly not some closely guarded secret as far as I can recall. Between being a shelf stacker and working in a bank, I worked in a University library, and BBC pronunciation dictionaries were commonplace. Must've had problem filling column space at the Telegraph today I guess (last week they printed the same story twice on opposite pages).