Lunch?

I came across this when I passed a bus shelter earlier on today, so it is definitely not my lunch.  I really don't understand why some people think it is OK to just leave your litter lying like this. 
 Anyway, I have moved on to the Improvers ukulele class and we have just been given a massive pile of music which we will be working on each week.  There are some great songs in the book, so I am looking forward to playing various Beatles and Abba songs.