I've never heard London so quiet as it was during the 2-minute silence today. Private cars pulled over alongside the cabs and buses and many drivers actually got out. Along the street I work in, there were many people standing outside virtually every business (including our entire office). From friends who were in Oxford St, I've heard that you could have heard a pin drop... It's certainly the best-observed silence I've heard and the most visible - what a great idea it was to encourage people to go outside rather than sit at the desks where people are tempted to just work quietly.