Met Police say Olivia is described as:
- Light skinned black female, 5ft 5 inches tall
- She has long, blond and brown plaited hair
- She was last seen wearing a dark green hooded coat, a white school polo shirt, black trousers and black shoes
- She has a mental age of five-years-old
Anyone who has seen her or who knows of her whereabouts should call police in Enfield Borough on 07825832887 or 101.