<human>:  Why did they use a horse-drawn carriage for the recent Royal Burial in London?
<bot>: The horse-drawn carriage was used because the Queen Mother was a horse lover. She was also a fan of horses and rode horses on occasion. The Queen Mother loved horses so much that she had a stable built on the grounds of her estate. She also had a horse-drawn carriage built for her so she could travel around the estate.