560 tonnes of new rail, 7,000 new sleepers and 20,000 tonnes of new track ballast is being stored ready for the modernisation work, which will see the Metro's longest line closure for more than 30 years.
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The remaining two anti-fracking protestors who climbed a rig at a live well site in Kirby Misperton, North Yorkshire, have been removed.
The incident near Fenrother involved a Honda Civic travelling south from Scotland and a Seat Ibiza travelling north from Morpeth.