The Class 717 is train manufactured by Siemens in the family of Desiro Cities. These trains are built to replace the ageing Class 313 which formerly ran the Northern City Line after being replaced by National Rail. The Class 313s are ageing quickly that the Class 717 quickly replaced every Class 313 serving the line and all 313s owned by GTR(Govia Thameslink Railway) has been scrapped. The trains are 6 cars in length, with no toilets available.
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