Replacement bus service running on Northern Rail between Carlisle and Hexham due to obstruction on the line at Haltwhistle.All lines are blocked.
Journey times may be extended by up to 30 minutes. There is no estimate for a normal service.
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The victim was walking her dog last month in an area known to locals as 'Black Bobby's Field'.
Lewis Kerr collided with another rider before hitting a fence during a race meeting in Peterborough.
Extra officers are in the Wallsend area to carry out enquiries and to offer reassurance to the community.