Northern and Network Rail have launched an appeal for information after vandals threw a log into the path of an oncoming train near Bolton.
Special rail services have run between Newcastle and Morpeth in advance of the reintroduction of passenger trains on the Northumberland Line.
The UK's operator of last resort (DOLH) has taken over the Northern franchise (1 March) after serious problems with services on the network.
The Northern refurbishment works are now two thirds complete. As part of its franchise agreement Northern is refurbishing 243 trains.
Northern continues its fleet roll-out with the introduction of new trains for Blackpool starting 9 September, running services to Liverpool.
Northern has introduced an additional 15 CAF Civity diesel trains on its network as part of its programme to replace its Pacer train fleet.
Given the DfT's policy that all trains must meet accessibilty requirements by 1 January 2020, Northern Pacer trains are being retired.