ER trailer Channel 4/More 4/E4

[harrietrose5]

What is the music used on the most recent UK trailer for ER? It is a female vocal in lots of layers with very close harmony. I only saw it today for the first time, so it's relatively new. I'm desperate to know what it is, as I've heard the song a few times before but never caught the name of the artist.

[grims]

The song is called 'Hide and Seek' by Imogen Heap.