Gregory was last seen at around 8am on Tuesday, September 16th when he left home to go fishing at Porth Beach.
He was travelling on foot. He is described as a white male, who speaks Russian. He is around 6ft 1ins tall and with short grey hair. He may be wearing a red zipped up hoody, jeans and carrying a fishing rod and backpack.
Searches have been ongoing overnight in the Newquay area including Porth and Trevelgue Headland supported by Coastguard
Anyone who sees Gregory, or knows of his whereabouts is asked to contact police on 999 quoting log 673 16/09/25.
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