The AAIB recomended in a similar case involving a Virgin A320 mentioned earlier in this thread to modify the V2500 fan cowls such that when closed but not latched they would sit proud of flush and therefore more likely to spotted on a walk round and until such times as a Mod was in place carry out Duplicate Inspections of the latches.
I wonder what the AAIB will recomend now as it would appear that this Aircraft had the Mod and BA were still doing Duplicate Inspections!!
Perhaps what they should recomend is that all tasks carried out in Line and Base Maintainance are actually inspected by Licenced Type Rated B1 or B2 Engineers who are given the time and the work culture etc etc to do the job right first time. Duplicate Inspections become 'diluted' in thier importance when they are used as the sticking plaster fix for Human Factor errors.
I may be jumping the gun here as the final report is yet to be released but I think the incident details so far are timely reminders for us all.