First test train to use a new signalling system on the Northern City Line

The testing of the new digital signalling on the Northern City Line has commenced with the running of the first Great Northern train between Finsbury Park and Moorgate under the new system.
The testing is carried out with a Great Northern Class 717 train and marks an important milestone in a project that will ultimately see traditional signals removed from the tracks along this route. Digital signalling intends to reduce delays and hence offer a more reliable service.
The first test train ran in