It all started with the headline of Roberto Ferdman's WaPo article on the original linked study which appeared a few months ago.
https://news.ycombinator.com/item?id=9138580
A dozen other blogspam variants on that article appeared in short order and here we find it echoing again.
Although the direct source is American I can't help but think that the underlying meme has something to do with the objective horribleness of British food and the ubiquity of Indian restaurants in the UK.