However, train operator East Midlands Railway says there may be the ‘odd residual delay’ for a time as the service gets back to normal.
It led to services being diverted along a different route and no trains calling at Hucknall, Newstead or Bulwell.
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Network Rail engineers have now replaced the stolen cables and the line is open again.
EMR tweeted: “After a theft of signalling cables near Nottingham earlier today, the line has now reopened on our Nottingham/Mansfield/Worksop route.
“The cables have been replaced, however, some residual delays may remain.”
The company advises people to click on its website here for the latest information.