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Signalling chaos: Inside the Elizabeth line's two-day breakdown
Last month, the Elizabeth line suffered two days of problems when the signalling system broke down, and now a clearer timeline of what happened is emerging.
5:15am – the first train departed the Plumstead depot heading towards Paddington, and difficulties were reported communicating with the signalling system, with the service dropping out and restoring repeatedly over the next 25 minutes. The rest of the network east and west of central London runs under “Contingency COS 0”, which is from Paddington and Liverpool Street mainline stations rather than the tunnel platforms. 8:50am – Drivers also reporting problems with the GSMR radio links, so a full reset of the Elizabeth line takes place.
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