Cartridge for an aerosol delivery system

A cartridge for an aerosol delivery system, the cartridge comprising:

• a fluid reservoir including a first reservoir portion for containing a first liquid, a second reservoir portion for containing a second liquid, and at least one liquid barrier configured to separate the first and second reservoir portions, wherein the first and second reservoir portions have respective first and second openings at a first end of the cartridge;
• and
• a perforate membrane located at the first end of the cartridge and extending over both of the first and second openings such that a first side of the perforate membrane is in fluid communication with the first and second openings, the first and second openings being configured to supply first and second liquids to the perforate membrane during use, the perforate membrane comprising a plurality of apertures configured to eject one or both of the first and second liquids from a second side of the perforate membrane in the form of liquid droplets when the perforate membrane is vibrated during use.