Minor variations of the route of the X2, known as the X21 and X22, operate somewhat more infrequently to serve surrounding villages along the route of the X2, including North Cove and Whitton; the X21 three journeys in the morning peak and five in the evening peak, while the X22 runs every hour from Monday to Saturday daytimes.
Minor deviations from the X2 route, designated as the X21 and X22, occasionally operate less frequently to serve nearby towns along the X2 path, including North Cove and Whitton; the X21 makes three journeys during morning peak hours and five during evening peak hours, while the X22 runs every hour on weekdays.