Was Emily davison killed on perpuse or by an acidant?

Emily Davison, a British suffragette, was killed in 1913 after stepping onto the racetrack during the Epsom Derby in what was believed to be a protest for women's voting rights. It is unclear whether her actions were deliberate or accidental, as she may have intended to display a flag on the horse or disrupt the race to draw attention to the suffragette cause.