Keith has always rejected historians, who don't agree with him no matter how "well regarded"

Completely untrue, I reject none.
On WW1 there are no living historians who did disagree with me.

Musket, there is no historian who disparages Hastings like that, unless you are having delusions of historical importance again.

Steve, I have no opinion on whether the plot is real or not, but Andrew Gilligan in that Telegraph piece clearly does.