Substantial increase volume of traffic leading to increased congestion, especially at the junction of Sharman's cross/streetsbrook/stonar park/Dorchester roads and outside sharmans cross junior school.
More pollution.
Are there places for children at sharmans cross school? If not, children will have to be driven to further schools. See point above.
Strain on existing facilities - schools, doctors, dentist etc. More parking chaos at prospect road shops.
Loosing the old character of the area by changing the landscape and potentially cutting down old trees. Loss of wild life habitat.
Loosing local sports facilities.