I found it on Saturday, and now will share.
The hideous American cover for Lisa Kleypas’ Hello Stranger now has a UK/Australian rival:
(Yes, it’s tiny. I will update when I find a bigger version.)
It has a very “Victorian London” feel to it – I lived and worked on London streets like that.
It might not be the most spectacular cover ever made, but at least it looks like the 19th century, rather than the 1980s Prom Queen version: