Police are hunting for a man in his late teens who viciously targeted a 16-year-old girl who was meeting a gang of friends in Eastfield Cemetery.
The teenagers had congregated on Tuesday evening in a wooded area to discuss their exam results in a meet-up that was initially good-natured
One male who arrived on the scene became aggressive around 10.30pm.
When his violent advances were rebuffed by the group, he then turned his attentions on a 16-year-old girl who was spat at and punched on the head.
The girl suffered bruising to her face and was taken to hospital as a precaution.
Officers say that a named individual is being investigated but want more young witnesses to contact them on 101.
Alternatively call Crimestoppers on 0800 555 111 where anonymity can be maintained.