Sussex's total of 291 for three on a dry, slow pitch was always going to prove too much, especially after Unicorns' openers Michael Thornely and James Ord were dismissed in the first four overs of the reply, and the visitors could only make 147 for nine.
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A number of teenagers, aged 13 to 15, from Portsmouth, have been treated in hospital, after taking tablets believed to be diazepam.
Thursday Evening's Pollen Forecast
Thursday night's weather for the east of the region