I've been watching this thread for the past few days and have decided to throw my 2cents in!
And I'm going to start with a curve ball, I don't think 'Pure Jingles' are behind these new Power Intros and Idents that we are hearing. They do the "Where It Begins" TOHs and that's it.
Lets bring 'On The Sly' to the table for a second. They already produce the Summer Mixes (this years and last years) as well as The Live Lounge imaging. They create a lot of power intros for other stations and in general, which is why I think they (and the R1 station sound team) are behind them.
Another reason why I think this? Mike Wooller, male voice from 2012 and these new Power Intros, is one of On The Sly's voice over artists, and I'm sure I've heard this new female voice on one of their demos before.
As far as the old Pure Jingles package above goes, if you check out their soundcloud page you'll find that demo listed 2/3 years ago, proving that it is an old package and not a new one.
Newsbeat have been known to use an old voiced bed every now and again, so there's nothing new there.
Have I missed anything?