If you are thinking of doing something for Rememberance Sunday, the Churches Together in Britain website has a powerpoint slide presentation which could be useful to you:
Here is the link; http://www.ctbi.org.uk/233
and this is the download to look for:
Remembrance Sunday – Powerpoint of poppies (3.1 MB)
Please note: the photographs have a Creative Commons licence and can be freely shared if you adhere to the licence terms (see the final Powerpoint slide).
You could just watch the slides during a period of silence, or with appropriate background music; for example Barber’s Adagio or Schubert’s Quintet in C major second movement.
Or you could use them as a starting point for a composition… layering up textures and sounds to a climax, fading, growing, fading, contrasting different timbres and tempi…