Surrey v Essex, Yorkshire v Sussex, and more: county cricket, day four – live

Updates from day four of the latest round of matches
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And another one down for Derbyshire, Andersson for a two-ball duck to Will Williams, who is having quite a game.

Good and bad news for Derbyshire fans – Matthew Montgomery has 50, but nightwatchman Ben Aitchison is out. Derbys 125-4, still trail Gloucs by 92.