The advice I have received reads "Once a call for poll has been received by the required ten parishioners, the opportunity for co-option has passed and is no longer an option for the parish council. The Notice of Election will continue to be published until either a) a single nomination is received within the time period for receiving nominations, in which case that person will be elected uncontested (as in your case), or b) more than one nomination is received in which case the election will be contested and will proceed to poll. I don't have a real problem with it, just didn't know about it . So really just sharing for info,