Toast seems to be more popular in the UK than here in the US. I remember Saturday lunches when I was growing up, or any lunches when I was at uni., would often be something on toast. Baked beans on toast. Poached egg on toast. Sardines on toast. Cheese on toast. This song about toast even did quite well in the charts!
My DH turns his nose up at 'something on toast' as a meal, as do the children. It was a nice quick, and cheap lunch and I still enjoy it from time to time - though usually when I'm on my own!
Still, I was never so cheap as to make a toast sandwich - something Mrs Beeton apparently included in her famous cookbook! I'm not quite sure why the Royal Society of Chemistry decided to revive the toast sandwich and tout it as the UK's cheapest meal. A slice of toast between two slices of bread - never mind if it's cheap, it hardly sounds nutritious, does it? If I'm going to have an unhealthy meal of carbs with my carbs, a chip butty or a crisp sarnie (or maybe even a conny onny sarnie) would be much more to my taste!
(Sheffield United anthem - "You fill up my senses like . . . a greasy chip butty")
5 hours ago