Your A320 seems to have a safeguard against NU trim when the Stall Warning sounds
Dozy I have an apology and a confession to make:
You have mentioned several times recently that the A320 has a feature where NU THS movement is inhibited in Alternate when Stall Warning is triggered. Since you got that from me I thought I should check my source,and to be blunt I can't trace where I got it from. There IS a normal law feature on both A320 and A330/340 where NU THS movement is limited to the existing value when alpha protection is triggered (and THS limited to 2 deg ND); i.e. no further NU trim is allowed when there is a potential incidence problem looming, but I can't find any reference to a similar feature in Alternate (possibly worked off stall warning).
That being said, it seems to me that such a function would fill what BOAC is looking for rather well, and I can't see any particular reason or difficulty to prevent it.
Sorry!