I've just listened to the 2-minute silence from Whitehall. As it began troy couples hear a small child crying. As the sound supervisor changed the mix on the effects mics to reduce the level of the child's sound another, clear, loud and strong adult voice became very noticeable.
All it said was three words repeated slowly and clearly:
"No more war!"
One person with the courage to sum up simply the sentiments of every person attending that service.