Running at the moment is an ad for film four. I think it might be "films to see before you die". My question is what is the classical piece of music used in the ad? Its really simple and Ive heard it even on peoples phone rings, but I love it. Please can someone tell me what it is, guessing Mozart but could be wrong. Need to know the name of the piece as well! Many thanks.

Many thanks for your post - the piece of music is Prelude In C Major(From The Well-Tempered Clavier)by Johann Sebastian Bach

thanks so much for replying, nice1. Bach eh? The genius of that.