A vapour provision system comprising: an inhalation sensor; an input button; control circuitry and a vaporiser for generating vapour from a vapour precursor material when provided with power from the control circuitry, wherein the control circuitry configured to provide power for the vaporiser to generate vapour both in response to determining from signalling received 5 from the inhalation sensor that a user is inhaling on the vapour provision system and in response to determining from signalling received from the input button that a user has activated the input button for at least a threshold amount of time.