Published: 00:00, 15 June 2014 |
Updated: 16:43, 15 June 2014
Tredwell has been frozen out of Kent's LV= County Championship side in favour of Adam Riley since the opening match of the campaign when he returned match figures of 3-137 against Worcestershire in April.
But the 32-year-old Ashford-born spinner, who is England's first-choice one-day spinner, will continue to play limited overs matches with his parent club. Ironically, Sussex are due to visit Canterbury on Friday night in a T20 Blast match.
A Kent statement confirmed: "Tredwell will continue to play for Kent Spitfires in the T20 Blast and Royal London Cup."
Tredwell said: "It’s a great opportunity for me to join up with a club like Sussex who I have admired for a long time throughout my career.
“I’ve played with a lot of the guys over the years and played age group cricket with the likes of Matt Prior and Carl Hopkinson so it’s an honour to join up with them again.
“I’m really looking forward to getting some red ball cricket under my belt.”
Tredwell is due to make his Sussex debut at Arundel on Monday in a four-day game against Yorkshire. Other matches in the month-long stint are games at Durham and at home to Northamptonshire.
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