I just got this through the post this morning, which I'd completely forgotten I'd preordered a couple of months ago:
It's not a new album exactly, but she's redone a load of older songs with a full orchestra, including new vocals, and they sound **** ing stunning.
It's not exactly a "greatest hits" either, as most of the tracks are just random album tracks rather than singles (apart from Winter and Silent All These Years), so it's clear that she's gone through and selected tracks that would best benefit from an orchestral reworking.
She's doing a one-off concert, with the full orchestra, at the Royal Albert Hall, and I'm gutted that I can't go (weeknight in London) or that she's not bringing it up north. I'm guessing it costs a **** load to pay for an orchestra though. DVD later hopefully...