Complex sentence: In 1999, a young car reviewing journalist named James May was introduced to the show and presented it for its last two years before transitioning to the new format for its 2nd series in 2003.
Split into simpler sentences: In 1999, a young car reviewing journalist called James May was introduced to the show and presented it for its last two years. Before transitioning to the new format for its 2nd series in 2003.