A variable displacement vane pump for dispensing lubricant to a system, comprising: a housing; an inlet for inputting the lubricant from a source into the housing; an outlet for delivering the lubricant to the system from the housing; a control slide displaceable about a pivot pin within the housing between a first slide position for maximum displacement and a second slide position for reduced displacement to adjust displacement of the pump through the outlet; a resilient structure biasing the control slide in a first direction towards the first slide position; a rotor with at least one vane mounted in the housing and configured for rotation within and relative to the control slide, the at least one vane configured for engagement within an inside surface of the control slide during rotation thereof; a first control chamber between the housing and the control slide provided on one side of the pivot pin such that supplying the lubricant to the first control chamber urges the control slide in the first direction towards the first slide position; a second control chamber between the housing and the control slide provided on the other side of the pivot pin such that supplying the lubricant to the second control chamber urges the control slide in a second direction opposite the first direction towards the second slide position; characterised by a control system controlling delivery of the lubricant to the first and second control chambers of the pump, the control system comprising a control device (46, 22A) axially aligned on an axis of the pivot pin and being mounted to permit pivotal movement about said axis between at least a first control position and a second control position; the control device having a feed port communicated to the lubricant and a vent port; wherein, in the first control position, the feed port of the control device is configured to deliver the lubricant to the first control chamber and the vent port of the control device is configured to vent the second control chamber, thereby moving the control slide in the first direction towards its first slide position and increasing the output flow of the pump, and wherein, in the second control position, the feed port of the control device is configured to deliver the lubricant to the second control chamber and the vent port of the control device is configured to vent the first control chamber, thereby moving the control slide in the second direction towards its second slide position and decreasing the output flow of the pump. a housing; an inlet for inputting the lubricant from a source into the housing; an outlet for delivering the lubricant to the system from the housing; a control slide displaceable about a pivot pin within the housing between a first slide position for maximum displacement and a second slide position for reduced displacement to adjust displacement of the pump through the outlet; a resilient structure biasing the control slide in a first direction towards the first slide position; a rotor with at least one vane mounted in the housing and configured for rotation within and relative to the control slide, the at least one vane configured for engagement within an inside surface of the control slide during rotation thereof; a first control chamber between the housing and the control slide provided on one side of the pivot pin such that supplying the lubricant to the first control chamber urges the control slide in the first direction towards the first slide position; a second control chamber between the housing and the control slide provided on the other side of the pivot pin such that supplying the lubricant to the second control chamber urges the control slide in a second direction opposite the first direction towards the second slide position; characterised by a control system controlling delivery of the lubricant to the first and second control chambers of the pump, the control system comprising a control device (46, 22A) axially aligned on an axis of the pivot pin and being mounted to permit pivotal movement about said axis between at least a first control position and a second control position; the control device having a feed port communicated to the lubricant and a vent port; wherein, in the first control position, the feed port of the control device is configured to deliver the lubricant to the first control chamber and the vent port of the control device is configured to vent the second control chamber, thereby moving the control slide in the first direction towards its first slide position and increasing the output flow of the pump, and wherein, in the second control position, the feed port of the control device is configured to deliver the lubricant to the second control chamber and the vent port of the control device is configured to vent the first control chamber, thereby moving the control slide in the second direction towards its second slide position and decreasing the output flow of the pump.