Complex sentence: In 2003 she visited 14 ports around Britain, attracting 24,000 visitors; in 2005 she visited 12 ports around Britain, including a visit to the Festival of the Sea in Portsmouth, and attracted 20,000 visitors.
Split into simpler sentences: In 2003 she visited 14 ports around Britain, attracting 24,000 visitors. In 2005 she visited 12 ports around Britain, including a visit to the Festival of the Sea in Portsmouth, and attracted 20,000 visitors.