Due to the extent of the landslip caused by flooding near Spittal, just south of Berwick-upon-Tweed, services will still not run between Edinburgh and Newcastle on Friday.
"We apologise to our customers for the inconvenience and are ensuring engineers are working to fix the line quickly, but it is unlikely to re-open until Saturday morning."
The vast majority of homes left without power following this week's freak storms have been reconnected, according to suppliers.
Heavy rain has brought traffic chaos to the UK as flood waters closed railway lines and roads, and brought black-outs to the North East
Widespread disruption is expected to blight major transport routes for a second day after fierce storms battered England.