Nicholas Langrishe Alleyne Lash (6 April 1934 – 11 July 2020)^[1] was an English Roman Catholic theologian. Having served in the British Army, he trained for Holy Orders at St Mary's College, Oscott, and worked as a Catholic priest until 1975. He left the priesthood and turned to full-time academia, working as a lecturer and then Norris–Hulse Professor of Divinity (1978–1999) at the University of Cambridge.

Nicholas Lash was the author of numerous theological books, and was a regular contributor to The Tablet.^[9] A Roman Catholic, and considered a liberal, Lash voiced strong but measured criticism of practices among leading figures in his tradition, arguing for open debate on a variety of topics, including the ordination of women.

He was reportedly one of the few Catholic theologians to have read the whole of Karl Barth's Church Dogmatics and the whole of Karl Rahner's Theological Investigations. One of Lash's strongest intellectual influences seems to have been the recovery of Aquinas's theology, using forms of philosophical argument influenced by Ludwig Wittgenstein, which became influential in the 1970s, associated with Cornelius Ernst and Fergus Kerr. Arguably his most significant piece of writing was also one of his shortest, his reflections on the Apostles' Creed, which includes discussion of the doctrine of the Trinity.^{[citation needed]}

He helped organize the 1973 symposium at Maynooth on Bernard Lonergan's Method in Theology.

Lash was born to Joan Mary Moore, a Roman Catholic of Irish descent, and Brigadier Henry Alleyne Lash, an officer in the British Indian Army. He had an elder brother, Father Ephrem Lash (né Christopher John Alleyne Lash; 3 December 1930 – 15 March 2016), who became an Eastern Orthodox archimandrite and prominent translator of patristic and liturgical texts. Nicholas also had two sisters: the artist and novelist Susannah Lash and the writer Jini Fiennes. The latter had seven children, including actors Ralph and Joseph Fiennes, filmmakers Sophie and Martha Fiennes, conservationist Jacob Fiennes, and musician Magnus Fiennes.

Lash was educated at Worth Preparatory School (Jan 1945 – July 1947) and Downside School (Sep 1947 – Dec 1950).

After leaving the priesthood, Lash married Janet in 1976. Together they had a son, Dominic.^[2]

His books include

• His Presence in the World: A Study in Eucharistic Worship and Theology (1968)
• Change in Focus: A Study of Doctrinal Change and Continuity (1973)
• Newman on Development: The Search for an Explanation in History (1975)
• Voices of Authority (1976)
• Theology on Dover Beach (1979)
• A Matter of Hope: A Theologian's Reflections on the Thought of Karl Marx (1981)
• Theology on the Way to Emmaus (1986)
• Easter in Ordinary: Reflections on Human Experience and the Knowledge of God (1988)
• Believing Three Ways in One God: A Reading of the Apostles' Creed (1992)
• The Beginning and the End of 'Religion' (1996)
• Holiness, Speech and Silence: Reflections on the Question of God (2004)