Fr Piers Grant-Ferris (72) committed the offences from 1966 to 1975 when he was a teacher at Gilling Castle, then Ampleforth’s prep school.
He is the son of the late Lord and Lady Harvington, whose home was in St Aubin, and is known to have been a regular visitor to the Island over the years.
The Harvingtons retired to Jersey in 1974.
Fr Grant-Ferris, whose conditional bail requires him to live and sleep at the abbey, will be sentenced next year after the preparation of psychiatric and probation service reports.
