A 35-year-old man was assaulted by another man in the Grosvenor Casino in Gunwharf Quays.
Police are appealing for the man in the CCTV image to speak to them in connection with the assault that happened on Sunday 6th October 2013.
The victim from Emsworth received facial injuries but they were not life-threatening.
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Two private citizens have already paid a "significant deposit" to take the week-long trip.
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