Hundreds of thousands of commuters suffered disruption as services were suspended on the Northern line, which is the busiest Tube line.
A signalling failure started at around 6am on Wednesday morning, the Northern line used by 800,000 commuters daily.
Hi all. We continue to have no service due to a signalling system failure, our engineers are working to get this fixed. Tickets are accepted on Southeastern, South Western Railway, Thameslink, London Trams & London Buses.
— Northern line (@northernline) September 4, 2019
London Underground director of customer service Brian Woodhead said, “I am extremely sorry for the disruption suffered by customers on the Northern line today following a signalling system failure at our control centre.
“Our engineers are working hard to fix the problem and restore a full service as quickly as possible.”