Todays music what is it off ?

Today's lovely piano music what is it off.

Were thinking its off an advert but mate thinks its something from a First World War drama and I'm beginning to think he is right because I think its the music from final Blackadder Goes Forth when they've gone over the 'top'.

Any ideas !

It was 3D's request he might know

Cheers Mermaid, checked the calender tab which and found its Claude Debussy - Clair de Lune and its used in Atonement, so it was First World War film after all.