A smoking substitute system (101) having a fluid inlet (107), a fluid outlet (108), and an aerosol generator arranged between the inlet (107) and the outlet (108) and in fluid communication with each. The aerosol generator is operable to generate an aerosol from an aerosol precursor (104). The smoking substitute system (101) further comprises a heater (130) arranged between the inlet (107) and the aerosol generator, the heater being configured to heat fluid drawn through the inlet (107) towards the aerosol generator. A source of flavourant (132) is provided between the heater (130) and the aerosol generator so as to be presented to a flow of fluid from said heater (130) towards said aerosol generator, the flavourant comprising one or more substances that activate at least one of an olfactory receptor in a human nasal cavity and a taste receptor in a human oral cavity. A flow of fluid heated by the heater (130) is effective to release flavourant (132) from said source for entrainment in said fluid upstream of said aerosol generator.
