You are beastly Ana but nevertheless I will tell you how I know.
I read a copy in Waitrose last week. It was the only paper left. I usually prefer the Mail and failing that the Telegraph (I read the Guardian on my ipad every morning and like a change).
I must admit, I am tolerant of nearly all the papers but the Sun was pretty awful. Page 3 still showing half naked women, a trashy approach to nearly everything else.
After reading it I felt like I'd eaten a big plateful of badly cooked fish and chips. I was left with an unpleasant aftertaste and wished I hadn't done it 