Thank you for your replies. They were very helpful. I see, based on Acton's view, that Maria Carolina was sort of a victim here. But why was the relatively low-ranking Bentnick "allowed" to create so much trouble in Sicily?
I'm still confused as to why the Neapolitan state archives stated that MC was sent away after the discovery of a plot against her husband.
I seem to recall that the British monarchy supported Ferdinand and MC with very substantial funds to run their court, etc. So I don't think the British treated her shabbily in that light. Wasn't she accused of plotting against the British? Is this true? If so, it seems a similar scenario with her mother Maria Theresa, who was heavily subsidised by the British, but she turned away from their alliance.