I'm pretty sure that Leaks said not.
Also, I think they've started with a really strong set of headliners (although I still think the undercard is weak af).
They have the opportunity to book a slightly more interesting headliner than being 'safe' with Dua Lipa for the third time in six editions (that said, I would still be happy if she was announced!)
That's the assumption, yes.
For scale, I recall there was a brief phase where BST Hyde Park would show a few songs from some but not all headliners on Sky but even that now seems to have bitten the dust.
Makes it sound like the scene in The Wolf of Wall Street where they have a bed topped in banknotes.
Something that apparently lead to Margot Robbie getting paper cuts all over her back, which - ouch.