The police have told ITV News "a number of arrests" have been made under section 12 of the Public Order Act after cyclists taking part in the Critical Mass bike ride broke the conditions of their protest in central London.
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His mother Princess Diana was killed in a car crash in Paris in 1997 when he was just 12 and his brother William was 15.
The 21-year-old, who was arrested on Sunday, also allegedly injured two other people in the attack in the German city of Reutlingen.
She was going to the aid of a family member who got out of the car in the middle of the park and was dragged away by a different tiger.