No, I don't think she's publishing anymore, the series was published in the late 90s and early 2000s.

Now that I figured out the Asquith parallels, I do wonder about who the Darrows and the Ashworths might be based on, yes, but I haven't found anything that immediately springs to mind yet. Definitely not the Llyod Georges (I checked).

Aysgarth, right.