The rail company says the strong local campaign has influenced its decision and the extra trains at Lockerbie are part of a wider investment.
The Managing Director of First Trans Pennine Express, Nick Donovan, said:
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A woman in her 50s fought off a man who attacked her with a walking stick.
Mark Quigley dragged "defenceless" victim Ryan Burns by the throat from a bar stool inside the Yellow Earl pub late on December 30.
34-year-old Andrew Bell held a child in a headlock and dragged her four meters down the street whilst under the influence of drugs.