The woman sustained “some serious injuries” from her fall, which happened just before 14:00 on Wednesday 26 July.
Both fire and ambulance services attended the scene, and police would now like to speak with anyone that may have seen the incident or who was nearby at the time.
Anyone with any information is asked to contact police on 612612, or the independent charity Crimestoppers anonymously on 0800 555 111 or via their anonymous online form at Crimestoppers-uk.org.