Twitter rumours, nothing concrete.
But the BBC said earlier (officially) all programmes suspended until 6PM which would make sense if there's an embargo to release the news.
Outlets would need time to prepare everything, although they'll already have media prepared you'd think.
Politicians wearing black, the family all gathering and the media paying tribute to her already... and then trying to say IF she does, I think it's pretty much saying she's passed.
I haven't had this feeling since Lady Diana passed.