We're terrible natterers Jim.
Just today at the checkout in Asda, we were behind another mixed-race couple. We all smiled, then we got chatting. The man was a black African and his wife white English, just like us. They also spoke French, and that was it. Yap yap yap. I had bought a tub of ice-cream, and it was slowly melting. But it was so lovely to have a natter.

I liked your description of the Giles cartoon. I bet these racist idiots would be only too relieved to have emergency treatment for a loved one by any nationality at all when the chips were down.