Before starting blaming each other it would be wise to : 1) listen to the whole R/T conversation .
2) wait for an preliminary Investigation report .
But being on PPRuNe , if I take this sentence from the news clip :
(effectively downwind), the crew reported they had the Iberia in sight on their TCAS display and offered to visually follow the Iberia, which the controller approved.
.
I could deduct ( speculation )
ATC cleared AR dowwind ,
AR requested to make a visual APP.
ATC should have given him the position/distance of the 2 preceeding ( more speculation from my side ).
AR misindentified the correct a/c based on a TCAS indication and turned base between the 2.
When it got too close TCAS RAs separated both a/c.
Lesson for us all :
Visual is with eyes looking out windows, ...not down into a TCAS dispay.