A young woman who was struck in the head by a spooked police horse during the Black Lives Matter protest in London at the weekend says she's been shocked by the Metropolitan Police force's response.Mounted police were brought in to control the largely peaceful protest, which was attended by thousands in London on Saturday.However, after an officer was knocked from her horse after riding into a traffic light, the animal ran on to the street in Whitehall, knocking down nursing student Jessie Tieti