A vehicle comprising: a door which is mounted for sliding movement between a closed position and an open position; and an access apparatus comprising: • an abutment portion arranged to be fast with the door of the vehicle; • a deployable step that is pivotally mounted to the vehicle for movement between a stowed position and a deployed position by rotating about a pivot axis, the step moving from the deployed position to the stowed position by rotating upwardly, wherein in the stowed position, the deployable step restricts movement of the door; and • a bias member arranged to urge the deployable step towards the stowed position; in which: • the abutment portion and the deployable step are arranged so that opening the door causes the abutment portion to abut the deployable step to move the deployable step to the deployed position against the bias member; • the abutment portion is arranged to abut the deployable step when the door is open, to prevent the step from moving back to the stowed position; and • the bias member is arranged to continuously urge the deployable step towards the stowed position, so that the deployable step automatically returns to the stowed position when the door is closed; characterised in that the abutment portion comprises a cam surface shaped to contact and move the step, in which a wedge interface is formed between the abutment portion and the step. a door which is mounted for sliding movement between a closed position and an open position; and an access apparatus comprising: • an abutment portion arranged to be fast with the door of the vehicle; • a deployable step that is pivotally mounted to the vehicle for movement between a stowed position and a deployed position by rotating about a pivot axis, the step moving from the deployed position to the stowed position by rotating upwardly, wherein in the stowed position, the deployable step restricts movement of the door; and • a bias member arranged to urge the deployable step towards the stowed position; • an abutment portion arranged to be fast with the door of the vehicle; • a deployable step that is pivotally mounted to the vehicle for movement between a stowed position and a deployed position by rotating about a pivot axis, the step moving from the deployed position to the stowed position by rotating upwardly, wherein in the stowed position, the deployable step restricts movement of the door; and • a bias member arranged to urge the deployable step towards the stowed position; in which: • the abutment portion and the deployable step are arranged so that opening the door causes the abutment portion to abut the deployable step to move the deployable step to the deployed position against the bias member; • the abutment portion is arranged to abut the deployable step when the door is open, to prevent the step from moving back to the stowed position; and • the bias member is arranged to continuously urge the deployable step towards the stowed position, so that the deployable step automatically returns to the stowed position when the door is closed; • the abutment portion and the deployable step are arranged so that opening the door causes the abutment portion to abut the deployable step to move the deployable step to the deployed position against the bias member; • the abutment portion is arranged to abut the deployable step when the door is open, to prevent the step from moving back to the stowed position; and • the bias member is arranged to continuously urge the deployable step towards the stowed position, so that the deployable step automatically returns to the stowed position when the door is closed; characterised in that the abutment portion comprises a cam surface shaped to contact and move the step, in which a wedge interface is formed between the abutment portion and the step.