then the birdstrike occured causing No1lose almost all power , G/A initiated by PF (FO) , then a second multiple strike into that engine
I'm not sure that I understand the above.
Are you saying that the bolded "that" above refers to No1 engine or a different engine?
Also I would have thought that for starlings only a single ball flock would be present in the vincinity and thus all strikes would have occurred in only a few seconds. However engine response symptoms to the crew may have taken longer to show up.