Parking on double yellow lines

Every weekday morning between 8.30 am and 9 am people parking on double yellow lines on both sides of Corn Street close to Marlborough Lane (Batt School) and obstructing other drivers from passing through. Corn Street becomes a one lane street and takes ages to get through. Not only nobody should be parking on double yellow lines which are quite visible but they also park on both sides of the road. This is causing frustrations and delays to the people like me who live on corn street and have no other alternative. We need parking wardens every work day morning to prevent people from parking there.