Engineers baffled by signalling issues on London Underground’s Northern line
https://www.theguardian.com/uk-news/2025/oct/23/engineers-baffled-by-signalling-issues-on-london-underground-northern-lineOpen linkView original on lemmy.worldhttps://www.theguardian.com/uk-news/2025/oct/23/engineers-baffled-by-signalling-issues-on-london-underground-northern-lineOpen linkView original on lemmy.world
Rats or water.
Or sabotage.