The Iryo train was stopped and unable to restart, because it's safety system did not allow that until the signalling issue was corrected. The AVE was commanded to move again like normal (200 Km/h or more). When the Iryo reported to be stuck, all the trains in the line should have been notified to stop once more, or go at line-of-sight speeds (40 Km/h). Both options are bad for delays. Current news is that five minutes after the Iryo call, the AVE rammed its back at 160-200 Km/h.
CEO of Iryo company complained 3 weeks ago about LZB being problematic, their trains taking a long time to recover connection. Safe but old, he said. It should have been replaced by ERTMS by 2024-2026.
That would have meant that the dispatcher would have been aware that they already ordered a collision before. If a train stops no accident will happen, unless it could have happened regardless. Yes, such a decision would have prevented the accident or lessened it's impact, but the absence of it has not caused it. The error was already done before.
What do you mean? "Everyone crash now"? Makes no sense. "Tried to solve"? There was no collision before.
The situation seems to be that they stopped the trains due to a problem somewhere. When they thought it was solved, they commanded all of them to move again. And when one reported to be unable to do so, they failed to stop those that were around it. Or that is what the leaked conversations suggest. Do not discard this was tactical leaks to blame a scapegoat. The newer system should be running.
I say around, because news mention that a third train could have crashed into the wreckage of the other two. It was moving in the other direction, towards Madrid. Luckly it stopped when the electricity failed. It would have been like the accident early this year, when a train hit other that just had a derailment.