Possibly. Any change would have to be undertaken by an order from the Principal Authority after a governance review was conducted. If there are several Parish or town Councils within your Principal Authority (PA) boundary, one measure that might be applied as a test is the ratio of Councillors to Electors in wards for other Parish or town Councils. So for example if other PC & TC 's have on average 1 Cllr per 2,500 electors and you were going up from 1 Cllr per 800 electors to one cllr per 1,000 electors, the PA might conclude that there is no case for extra cllrs.