New AAIB bulletin out with FDR plot. As we suspected, unfortunately. It is amazing how long they went without noticing the airspeed decay. The report doesn't mention any particular distractions so its a bit hard to get away from pilot error, but of course the foundations were laid earlier with decisions to:
Have the captain as PF
Fly the approach 3 axis
Intentionally destabilise the approach by reducing to 80kts late in the approach.
I wonder if any of those choices were contrary to their Ops Manual?
Also, not using ALT.A seems odd, but not contributory.