Hi RHS,
The only way to get out of this was to switch off two ADRs thus forcing alternate law where manual control of pitch could be reestablished?
Affirm. When we did it in the sim, we had TOGA Lock (due Alpha Floor activation) and overspeed "protection" fighting each other.
A "big red switch" would have been most welcome rather than the loss of a perfectly serviceable Altimeter Source (with 2 ADRs off) in order to regain control.