A cartomiser for a vapour provision system, the cartomiser including: a container for holding a reservoir of free liquid to be vaporised； an atomising chamber； a porous wick extending from inside the container, through an aperture in a wall of the atomising chamber, to inside the atomising chamber in order to convey the liquid from the reservoir to the inside of the atomising chamber for vaporisation； and a resilient seal provided in the aperture to restrict the liquid from entering the atomising chamber from the reservoir except by travelling along the wick.
