Stephen is the vicar of Christ Church, Virginia Water. He is also chairman of the International Bible Society UK, sponsors of the New International Version of the Bible (NIV) the most widely published translation in English.

Stephen is a trustee of several charities including the Amos Trust. He is vice-chair of Friends of Sabeel UK founded by Naim Ateek and on the Board of Reference for the Mar Elias Educational Institutions, Ibillin in Galilee founded by Elias Chacour. He is Campaign Coordinator for the Interfaith Group for Morally Responsible Investment and a founding member of the Institute for the Study of Christian Zionism. He is chairman of governors at St Ann's Heath School, Virginia Water.

He has a MTh in theology from Oxford University and a PhD from Middlesex University. His doctoral thesis on Christian Zionism formed the basis for his newest book. He has authored, or contributed to, several books including:

Panorama of the Holy Land, (Eagle, 1998)
Panorama of the Bible Lands, (Eagle, 2000)
Holy Land Hollow Jubilee, ed. N. Ateek & M. Prior (Melisende, 1999)
They Came and They Saw, ed. M. Prior (Melisende, 2000).
A 3rd Millennium Guide to Pilgrimage to the Holy Land, ed. Macpherson (Melisende, 2000)
The Land of Promise, ed. Philip Johnson & Peter Walker (IVP, 2000)
Toronto in Perspective, ed. David Hilborn (Paternoster, 2001)
In the Footsteps of Jesus and the Apostles, (Eagle, 2004)
Heaven on Earth : The Temple in Biblical Theology, ed. S. Gathercole (Paternoster, 2004)
Speaking the Truth about Zionism and Israel, ed. Michael Prior (Melisende, 2004)
Christian Zionism : Road-map to Armageddon? (IVP, 2004)
Challenging Christian Zionism ed. Naim Ateek (Melisende, 2005)

His articles have been published in Third Way, Cornerstone, Churchman, Living Stones, Holy Land Studies, Evangelicals Now and the Church Times. They are accessible from http://www.sizers.org/

Stephen coordinates the Living Stones Network providing information from various news sources on and from the indigenous Christians of the Middle East. He also a co-founder of http://www.christianzionism.org/together with Don Wagner, Gary Burge and John Hubers.

He has lectured extensively in Britain, the USA, Middle East and Eastern Europe. He is also a visiting lecturer at Wycliffe Hall, Oxford. He is married to Joanna and they have four children and a cat named Tiger.