A train reporting number in Great Britain identifies a particular train service. It consists of: A single-digit number, indicating the class (type) of train, followed by A letter, indicating the destination area, followed by A two-digit number, identifying the individual train or indicating the route (the latter generally for suburban services).
A train reporting number in Great Britain identifies a particular train service. It consists of: A single-digit number, indicating the class (type) of train, followed by A letter, indicating the destination area, followed by A two-digit number, identifying the individual train or indicating the route (the latter generally for suburban services).
Source: Wikipedia "Train reporting number" · CC BY-SA 4.0
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