Embodiments of the present invention provide a controller (200), comprising input means (230) for receiving an environment signal indicative of a feature in a vicinity of a vehicle, output means (240) for outputting a manoeuvre signal to cause a vehicle to perform a defined manoeuvre, and control means (210) arranged to provide at least one mode for performing at least a portion of the defined manoeuvre, the mode being selectable from a plurality of modes including at least one mode corresponding to an occupant-in-vehicle mode and at least one mode corresponding to an occupant-out-of-vehicle mode, the mode being selectable in dependence upon the environment signal being indicative of a vehicle envelope suitable for the mode.