What sits inside each fare
A fare pays for the hours she spends in your company, and nothing beyond that is offered or sold. Within those hours the shape is yours: the hotel bar, a walk past the fountains at Lancaster Gate, a restaurant, or a quiet room. Her travel within Zones 1 and 2 is already included, and so is the work the desk does to arrange it. Half hour slots do not exist here, and neither do add-ons with prices attached. The figure written in your confirmation is the figure that applies.