The 21-year-old joined Newcastle from Chelsea in the summer of 2021 and linked up with Eddie Howe's first team squad during summer 2023, making an appearance against Gateshead in a pre-season friendly.
After two-and-a-half years with the club, he now joins a Sligo side who finished 8th in last year's League of Ireland Premier Division campaign.
Everyone at Newcastle United would like to wish Charlie well for his future.