The Bishop of London, the Rt Revd and Rt Hon Dame Sarah Mullally DBE, has announced three new Prebendaries of St Paul’s Cathedral. Helen Dimmock and Pauline McCalla will be installed as Lay Prebendaries and The Revd Taemin Oh as an ordained Prebendary at 3 pm Evensong on Sunday 1 February 2026. Bishop Emma, as Acting Bishop of London, will preside over the installation and the Dean of St Paul’s will place them in the stalls.
Prebendaries are appointed by the Bishop of London after consultation with the Dean of St Paul’s in recognition of their work in the Diocese. As part of the roles in the Greater Chapter of St Paul’s, they are each given their own stall in the quire, are invited to preach once a year and are given a portion of the Psalms to recite each day. They also play a valuable role in maintaining the Cathedral’s close links with the parishes of the London Diocese.
The Bishop of London, The Rt Revd and Rt Hon Dame Sarah Mullally, said:
I am delighted to appoint three new Prebendaries to St Paul’s Cathedral. Their faithful service and diverse gifts will enrich the life of the Cathedral and our wider Diocese, strengthening our common witness to Christ in London. I am grateful for their commitment to prayer, pastoral care and mission, and I look forward to all that their ministry will bring.
Prebendaries
Helen Dimmock MBE, Ecclesiastical Secretary to the Crown and Lord Chancellor
Lay Prebendary to occupy the Prebendal Stall of Chiswick.
Helen has given faithful and impactful service to the Church of England over many years, marked by deep commitment, wisdom, and generosity of spirit. In her role as Ecclesiastical Secretary to the Crown and Lord Chancellor, she has demonstrated exceptional dedication to the careful stewardship of parochial appointments, ensuring that both individuals and the communities they serve are enabled to flourish. Her work has made a lasting contribution to the health and mission of parishes across the Church.
Alongside this national responsibility, Helen has offered distinguished leadership in education. As Chair of Governors at Bishop Ramsey Church of England School and Dr Tripplett’s Church of England Primary School, she has been instrumental in keeping the Christian ethos at the heart of school life. Through her vision and steady leadership, these communities have been shaped by hope, compassion, and strong values, benefiting students, families, and staff alike.
Helen also serves as Lay Chair of Hillingdon Deanery, where she brings diligence, passion, and a clear commitment to growth and renewal. She has played a key role in fostering a confident and hopeful vision for flourishing across the Deanery and throughout the Willesden episcopal area, encouraging churches to be bold in their mission and faithful in their witness.
A generous mentor and advocate, Helen has invested deeply in the lives of others, supporting many as they discern God’s call. Her particular commitment to the Wilfred Wood programme has been especially significant, championing clergy of global majority heritage and helping to strengthen and diversify the future leadership of the Church.
Pauline McCalla, Mothers’ Union President for the Diocese of London
Lay Prebendary to occupy the Prebendal Stall of Wilsden.
Pauline serves as Mothers’ Union President for the Diocese of London, a role of significant responsibility and influence which she fulfils with grace, courage, and deep passion. Having previously served faithfully as Vice President with oversight of Willesden, she brings many years of active involvement and experience, making her a strong and articulate advocate for the mission and ministry of the Mothers’ Union.
Her service reaches far beyond meetings and administration. Through her work with the Mothers’ Union, Pauline volunteered at the Visitors Centre at Wormwood Scrubs prison, offering compassionate support to inmates and their families. Her presence became a vital point of connection, particularly during the challenges of the COVID-19 pandemic, when her empathy and faith brought reassurance and hope in moments of profound difficulty.
Pauline has long been a champion of women’s flourishing in leadership, consistently speaking up for justice and promoting accountability and good governance within the London Diocese branch of the Mothers’ Union. Her clear voice, integrity, and commitment have strengthened the organisation and inspired many to step forward confidently into their calling.
The Reverend Taemin Oh, Dean of Cultural Diversity and Racial Justice for the Edmonton Episcopal Area
Ordained Prebendary to occupy the Prebendal Stall of Chamberlainwood
Taemin has served as Sub-Dean of Enfield Deanery for over five years, offering wise guidance, trusted collaboration, and consistent support to clergy and congregations alike. He is widely respected by his peers as a leader of integrity and humility, with a deep and evident commitment to the flourishing of the local church.
Alongside his deanery responsibilities, Taemin has held significant roles within the wider Diocese, serving as Dean of Cultural Diversity and Racial Justice for the Edmonton Episcopal Area and as a member of the Racial Justice Priority Group. Through this work, he has been a clear and courageous advocate for equity, dignity, and the celebration of God’s rich diversity, helping to shape a more just and inclusive life for the Church.
Taemin’s ministry among Korean Anglican communities in the United Kingdom reflects his strong pastoral heart and his ability to support culturally and linguistically diverse congregations. He brings a deep appreciation of heritage and identity, building bridges of belonging and fellowship across the wider Church.
He has also made an important contribution to AMEN, the Anglican Minority Ethnic Network, where he is recognised as a trusted leader and advocate for under-represented voices within the national Church. Through thoughtful leadership and principled engagement, Taemin continues to help shape vital conversations and champion meaningful and lasting change.