A POST mortem has revealed a woman believed to be Amelia Arnold died due to a head injury.

A body, believed to be the 19-year-old, was found on Sunday evening in a Hatfield wood.

A post mortem carried out has shown the cause of death was a head injury.

Formal identification has not yet taken place.

Jack Wall from Hadrian’s Walk, Stevenage was yesterday (Monday) charged with Miss Arnold’s murder.

He was arrested after handing himself in to a police station when detectives appealed for him to come forward, following Miss Arnold’s disappearance.