Alpha Prot is AoA driven but presented in relation to speed on the speed tape. The pilots will see the Prot band (amber and black) at the bottom of the speed tape and the RED overspeed at the top. Red beats amber hence pitch up to get out of the red. Turning off the ADRs gets rid of all erroneous speed indications whereupon the BUSS activates to show ONLY AoA fed from vane information which has a GREEN band (very comforting) when flying a safe AoA.
Thanks - was not thinking straight re my question.
My lack of knowledge re BUSS is most of our aircraft do not have them, and might have seen it in the sim once. But more importantly, IMHO if you survive the "diagnosis" of "Loss of Airspeed Indications" the subsequent handling is relatively "easy". I think the "total loss" events have never really even carried out the IAs?
My favourite, as seems yours (and not in the IAs) is the idle / 0deg pitch, in Cruise.