While we were in Asda they did the 2-minute silence over the shop tannoy, and I think everyone stood silently and observed it. It must have been strange for people coming into the shop and finding everyone standing silent and still, but fortunately nobody seemed to be confused by it. The only thing disturbing the silence was the self-checkout machines repeatedly asking for confirmation since the people checking out their shopping had temporarily stopped and the machines were getting confused by it.