Hello Pablo. Thanks for the answer.
I would love to read Piuma testimony of the combat. I had read Donaidille as well as Senn testimonies but not Piuma. According to my particular view, Piuma would be flying some distance from his fellows what let him to appear in scene the last one. Probably in a left rear position of the incoming flight. As the flight was intercepted from the right (Ward) and front (Thomas), that would have let Piuma to dog fight in last place.
As Dave kindly posted, Piuma fired against Ward, from his 5 or 6 o´clock, failing in the attempt. This is a great news as would be the only argentinean jet who get such a position against a Sea Harrier in all war.
So Ward was fired by Donaidille in two ocasions (when he broke to face him and just after crossing) and by Piuma.
But as I told, these are my supositions. Be free to send a pm if you prefer
Regards