Police say they are concerned for the welfare of a 33-year-old man.
William Parry, who was last seen on Wednesday December 22, 2021, has reportedly gone missing from Loughton.
He uses the train network for travel and is known to have links to North London areas including Stratford, Leytonstone, Woodford and Redbridge.
Mr Parry is described as being 5ft 10ins tall with a shaved head.
Police have urged anyone who has seen Parry, or who knows about his whereabouts, to get in touch immediately by calling 101.
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