Always surprised me when this event happens. We don't know all details, but…a Eurofighter has more sensors, radar and other toys than we'll ever know about. It's supposed to see a fly 40kms and be able to hit it at 10kms. I'm always curious how it can be taken by surprise by I presume another transponder squawking a/c. Surely, in this day and age, high speed a/c do not rely solely on Mk.1 eyeball. Would both not have had TCAS on, plus all the other gizmos of the fast jet.
Can someone of knowledge explain why pre-warning and evasion not take place, if only by the fighter.