>In one recording, the controller tells the driver of the Renfe train to disconnect and reconnect the LZB mechanism that monitors train speeds, and then resume the journey at normal speed.
Wait, I thought Spain's high-speed rail network was all ETCS L1 or even L2?
They don't all use ETCS. Madrid–Seville still uses LZB and Adif awarded a contract in 2021 to upgrade it to ETCS L2, but the project is delayed/unfinished