According to the BBC, Hugh Gilbert entered the Benedictine monastery of Pluscarden Abbey [a daughter-house of Prinknash Abbey] in 1974, and was elected Abbot in 1992. He was born in Hampshire, and originally named Edward - receiving his present name upon entering the religious life. Abbot Hugh was baptised in the Church of England and converted to the Catholic Church as an 18 year-old. He was educated at St Paul's School and King's College, London, where he gained a 1st class degree in history.
Spero News reports that Bishop-elect Hugh Gilbert reacted to his appointment this morning by saying: “I have much to learn, and it will not be easy to leave my monastery after 37 years. But I do so knowing that I am not going among strangers. I commend myself to the kind hearts and prayers of all whom I am called to serve. Together in Christ may we shine with the light of his Resurrection!”