New this year - the ability to substitute players suffering injury, illness or significant personal reasons.during the game.
It's already been used seven times in the first two Championship rounds. Having seen two players from opponents Yorkshire substituted because of food poisoning, Hampshire coach Russell Domingo has suggested (maybe not entirely seriously) that he could give a couple of players laxatives if they bowled badly in the first innings and then say they were feeling sick in the second innings and take them out of the game.
So maybe we missed a trick when our bowlers were under-performing against Sussex.