An aerosol delivery system has an aerosol generation apparatus with a heater and a fluid-transfer article. The fluid-transfer article has a first region for holding an aerosol precursor and for transferring the aerosol precursor to a second region. The second region has an activation surface which interacts thermally with the heater to form an aerosol from the aerosol precursor. When a user sucks or inhales through the aerosol delivery system, the aerosol is mixed with air flowing in an air-flow pathway between the activation surface and the heater, and may then pass to the user. A heat activatable movement element moves the heater between a first position and a second position. In the second position, a heating surface of the heater in spaced from the activation surface and the air-flow pathway is unblocked. When in the second position, the heating surface of the heater is in contact with the activation surface, obstructing the air-flow pathway and preventing or reducing leakage of the aerosol precursor when the system in use.
