At Moorgate station a southbound tube train from Drayton Park failed to stop on a terminus platform, ran into the tunnel, through the buffers and smashed into the wall at the end. Because it was built for mainline trains the tunnel was large enough to allow the carriages to ride up over each other. This was on a Friday at 08.46 so the train was packed with commuters. 43 died and about 80 were injured.
The train was travelling on the which was, as far as we can tell, not fully part of the tube system, but not mainline either. It still doesn't appear on the normal tube map.
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