Commuters have been urged to steer clear of London Waterloo station attributable to a “major signalling problem”.
South Western Railway apologised to passengers for the disruption and warned the influence could be widespread.
The operator advised commuters on Thursday morning: “A major signalling problem that developed overnight at London Waterloo means that a significantly reduced service will operate to and from Waterloo this morning.
“We’re advising prospects to not try journey to or from London Waterloo this morning because of this.
“Disruption will have an effect on different companies on the broader community so please examine earlier than you journey.
“We’re sorry for the disruption this morning. Engineers are working to restore signalling however we expect disruption to last for most of the day.”
South Western Railway stated the issue was attributable to “platforms 1 to 14 being unusable at Waterloo causing major congestion.”
Passengers could face prepare cancellations for the remainder of the day.
Trains to Alton, Guildford and Weymouth from Waterloo are among the many companies going through disruption.
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Chris Denham from Network Rail advised Sky News: “This morning we are advising customers not to travel to or from Waterloo, unless absolutely necessary because there is a severely reduced service in operation.
“There might be widespread disruption throughout South Western Railway companies.”
Network Rail tweeted earlier: “We’ve suffered a major power failure to signalling equipment at London Waterloo that means fewer than half the station platforms are usable by trains.
“We are advising South Western prospects to not journey to or from Waterloo this morning because the disruption is extreme.”
Travellers can declare full refunds if they’re unable to journey, and season ticket holders will get a reimbursement for the day.
Mr Denham stated prospects ought to to contact the operator for a refund on delays and cancellations.
Source: information.sky.com”