They weren't flirting with each other, or anything, doesn't look like Harry's date for the evening would've tolerated that. They were, however, in the same room at ACE Hotel in Dalston. They were also spotted leaving Shoreditch House around the same time.
According to Glamour Magazine, they were both attending an event hosted by Lou Teasdale, a hair dresser friend of theirs who was launching a book by the name of The Craft (expect lots of smokey eye techniques and dip-dyed hair).
Speaking of their fling back in 2011, Caroline (who is currently in a relationship with a fella called Jack) said in an interview with Metro: "We weren't bothered and his family wasn't bothered. But the thing about unconventional relationships is that other people do seem to be bothered... I mean, look, it was just really fun to hang out… I don't think we were ever going to have a long-term future. It was fun and it was hurting nobody." Some 1D fans would beg to differ.
Those also in attending last night's soiree included Ed Sheeran, Henry Holland, and Liam Payne (see glamourmagazine.co.uk for photos), but none of them have had a relationship together so they're not getting mentioned much this morning.
And there endeth today's non-story. Hey, at least you got to see Caroline Flack in something other than formal shorts.