getServiceDetailsByID is used to get information on a service, by the Service ID. This will typically return a train service, but will also return a bus and ferry services. The Service ID must be provided in the serviceIDUrlSafe format that is provided in the response for Arrival and Departure Boards. A service ID is specific to a station, and can only be looked up for a short time after a train/bus/ferry arrives at, or departs from a station. This is a National Rail limitation.