A vapor provision system includes an inhalation sensor； an input button； control circuitry and a vaporizer for generating vapor from a vapor precursor material when provided with power from the control circuitry, wherein the control circuitry is configured to provide power for the vaporizer to generate vapor both in response to determining from signaling received from the inhalation sensor that a user is inhaling on the vapor provision system and in response to determining from signaling received from the input button that a user has activated the input button for at least a threshold amount of time.
