Did Horner refuse an RBR re-structuring plan which led to his departure?

[John S]

According to Tyler Rowlinson, on F1oversteer.com, Christian ruled out a re-structure plan for Red Bull Racing during a meeting at the British GP. This could explain his abrupt departure.

Anyone else got any snippets of info or rumour of why now for Horner's sacking to add to the party?

"At the British Grand Prix, Horner refused to entertain a restructuring at Red Bull, which could well have been his downfall. Verstappen had a ‘final standoff’ with Red Bull CEO Oliver Mintzlaff, and he was ultimately successful."
Courtesy Tyler Rowlinson, F1oversteer.com, Weds 9th July.

[Jericoke]

I would imagine Horner's firing is the summation of many things, not a single element.

Given that Horner was key to RBPT as much as the RBR racing team, that's bigger shoes to fill than just another Team Principle.  Amongst other reasons, if there is a hiccup in the power trains division (and I seem to recall that RBPT was looking for a rule change/clarification for something), that would fall squarely on Horner more than losing a few races or employees.  Even as I type this out, perhaps that is the board battle he lost.