1950
January – participation and a talk for the Week Prayer for Christian Unity, Caxton Hall, Westminster. Subsequently, he regularly participated in the Week of Prayer for Christian Unity until 2001.

1959
January 22 – a talk – a memorial lecture (invited speaker) in memory of Drawbridge as part of the Week of Prayer for Christian Unity.

1960
January 22 – participation in the Week of Prayer for Christian unity.

1963
January 19 – participation and a sermon for the Week of Prayer for Christian Unity. Southwark cathedral, London.

1970
January – participation and a sermon for the Week of Prayer for Christian Unity. Westminster Cathedral.

1975
January 15 – 25 – participation and a sermon for the Week of Prayer for Christian Unity, Westminster Abbey.

1976
January – participation in the Week of Prayer for Christian Unity.

1977
January – participation in the Week of Prayer for Christian Unity.

1978
January – participation in the Week of Prayer for Christian Unity.

1980
January – participation in the Week of Prayer for Christian Unity.

1981
January – participation in the Week of Prayer for Christian Unity.

1983
January – participation and a sermon for in the Week of Prayer for Christian Unity. Sevenoaks, Great Missenden.

1984
January – participation in the Week of Prayer for Christian Unity.

1985
January – participation and sermons for in the Week of Prayer for Christian Unity. New Malden, Our Lady of Victory.

1986
January – participation and a sermon for the Week of Prayer for Christian Unity, Longton.

1988
January – participation in the Week of Prayer for Christian Unity.

1989
January – participation in the Week of Prayer for Christian Unity.

2001
Participation in the Week of Prayer for Christian Unity.