The County Championship will see three teams promoted and one relegated next year to create a 10-team top tier from 2020.
Yorkshire sign Nottinghamshire opening batsman Will Fraine on a three-year contract.
Yorkshire beat Worcestershire by seven wickets to end the season in fourth place in the County Championship.
Gary Ballance hits 189 not out and Jack Brooks 82 as Yorkshire take an unexpected lead against Worcestershire.
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How to get into cricket - physical exertion with a chess-like element in matches which range from half an hour to five days.