Born in Zimbabwe, Gregory finished his education in England. He read Art History at Cambridge and was a Bendictine monk for 18 years.
Gregory has trained under some of the most distinguished potters of the 20th century. At Buckfast Abbey, he was apprenticed to Mary Boys-Adams (nee Gibson Horrocks), a pupil of Bernard Leach, and at Quarr Abbey, Molly Attrill was his mentor. Gregory worked and taught at Dartmouth Park Pottery in North London for ten years. Hauser and Wirth, Somerset, have selected him as their Artist in Residence the summer of 2019.
Gregory is particularly known for his sgraffito pattern-making.