Svarin on 12Apr 10:54
One interpretation is PRIM2 loses connection with ADR1 (part of ADIRU1) through a failed bus. BEA exlained it away with "PRIM2 rejects ADR1"... However, this particular failure does not seem to have anything to do with unreliable airspeed and ADR comparison, it is quite obviously an electronics connectivity issue : WRG means wiring, gentlemen. Airbusese for "warning" is WRN.
I had doubts about that definition of WRG, and PJ2 negated it, but perhaps too politely, losing impact. On 12 Apr at 14:09 he wrote that WRG means the fault is not correlated by another computer of the FWS.
This does not make it a wiring fault, although that's a possibility. It was much more likely an issue with erratic airspeed being captured at slightly different times by two computers.