Bent,
Thanks for the reply as regards:
ATC is supposed to advise pilots of traffic so they can arrange their own separation. In this case there was heaps of traffic, but he did not advise them, and the collision happened a minute later. The instructor (and student) was aware there was traffic (from the radio) but was not told where to look.
My question goes to the solid evidence that this was, indeed, the case - see bold.
I am not having a swipe at you, or anyone else that wants to comment; but I think that if that criticism is going to be levelled at the guy on the end of the mic, then surely there should be corroborating justification (on the website) as to the assertion that his performance was 'deficient'.
Maybe I am missing something in respect of 'due process'.