Which member of the British Royal Family was convicted by the British jury and fined £500 for violating the Dangerous Dogs Act? 

Princess Anne, the Princess Royal, became the first senior member of the British Royal Family to be convicted of a criminal offense in modern times. In 2002, she pleaded guilty to a charge under the Dangerous Dogs Act after her English bull terrier bit two children in Windsor Great Park. She was fined 500 pounds and ordered to pay compensation and costs.