Legally there is no requirement on a parish council to convene a parish meeting although most do so for the annual parish meeting but there are no penalties if they do not. Similarly there is no legal reason for a parish council to take note of any decision of a parish meeting although again, most may well do so and in my opinion would be advised to but again no penalties if they do not. The only penalty, if that's what you want to call it, is to pay for the poll which is conducted by your district/county elections team and charged accordingly. Arguably a questionable use of residents money as it takes funding away from the parish which could/should be used for the benefit of all residents.