What is the song used in Derren Brown's Mind Control TV Special? Not
the opening theme, but the opera-ish used throughout the show.

Short sample can be found at : http://www.winters-wish.com/derren/help.wav

The track is a contemporary version of 'O Euchari, in Leta Via' by
12th Century composer, Hildegard von Bingen.

This interpretation is entitled 'Vision' and is performed by Emily Van Evera.

It is available on the album 'Vision - The Music of Hildegard von
Bingen' (Track 3):

http://www.amazon.com/exec/obidos/tg/detail/-/B000002SL6

Ahh... Thank you very much, is there any way I can send the answer
money to you instead?

shasderias,

Since you received your answer in a free comment made by someone who
is not a Google Answers Researcher, payment is not possible. One of
the most interesting things about Google Answers is that occasionally
our customers receive useful free information from helpful site users.
My hat's off to nproctor for identifying this music!

~pinkfreud, Google Answers Researcher

I was asking more on the lines of... Could I arrange an alternative
payment thing with nproctor :P Silly song has been bugging me for
ages, I'm a happy person :D

shasderias,

As pinkfreud mentioned, I am not a Google Answers Researcher so you
cannot pay me, but thanks for offering! Glad I could help.

nproctor

Well, thank you very much then! :)