Just seen the Water Aidadvert, what an amazing piece of background music.
The piece of music is called 'Now We Are Free'. It was used in the sounds track to the Gladiator movie. The original version was by Enya, however the piece in the Water Aid advert was apparently by Lisa Gerrard.
Here's Enya's version
Enya/Gladiator - 'Now We Are Free' Music Video
Here's Lisa's version...
Gladiator theme - Now We Are Free - Lisa Gerrard
To donate or to find out more about the work of Water Aid click here.