At the Port of Dover in Kent, officials said this morning that cross-Channel ferry operations were operating "as far as possible".
Passengers are being advised to allow extra time for journeys ahead of possible road blockages on the A2 and A20.
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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.