It does depend on your type of interest and whether you have been granted dispensation or not - if you are attending the meeting as a councillor.
Taking off your councillor "hat" and putting on a member of the public "hat" on mid meeting is frowned upon as your position on the council becomes questioned, It is must better to declare an interest and not comment or ask for a dispensation and then comment.
There are two viewpoints being circulated, but you are leaving yourself open, I would take advice discussing the specific detailes from your monitoring officer