Born Sarah Elisabeth Bowser on 26 March 1962,[4] the younger of two daughters, she was educated at Winston Churchill Comprehensive School, Woking, Surrey, then at Woking Sixth Form College. While studying for A levels she decided to become a nurse rather than a doctor because she wanted to apply a holistic approach to patient care.[5] Her choice of career was also motivated by her Christian faith, which she has held since the age of 16.[5]
Mullally held clinical nursing posts at St Thomas' Hospital and The Royal Marsden Hospital (where she completed their specialist nursing course). She held a number of nursing leadership roles, firstly at the former Westminster Hospital (where she was a Ward Sister and head of practice development) and then as director of nursing at the Chelsea and Westminster later becoming deputy and acting chief executive officer. In 1999 she was appointed as Chief Nursing Officer and Director of Patient Experience for England: she was the youngest person to hold these positions. She has been a non-executive director of the English Board of Nursing, Midwifery and Health Visiting.[7]
Mullally served as an independent Governor for London South Bank University between 2005 and 2015, where she became Vice-Chairperson of the Board of Governors and Chairwoman of the Policy and Resources Committee.[8] She was a non-executive director of the Royal Marsden NHS Foundation Trust from 2005 to 2012,[5][9] and held a non-executive role at Salisbury NHS Foundation between 2012 and 2016.[10] Mullally became a lay member of the Council of King's College London in 2016.[11]
On 18 December 2017, it was announced that she would be the next Bishop of London, succeeding Richard Chartres who retired in February 2017.[2] As Bishop of London, she is the third most senior bishop in the Church of England, after the archbishops of Canterbury and York.[22] Between her confirmation and her installation, she was licensed as an honorary assistant bishop in the Diocese of Exeter so that she was able to carry out engagements related to her former see.[23] She was duly elected to the see by the college of canons of St Paul's Cathedral on 25 January 2018, becoming bishop-elect.[24] She was translated and took full legal possession of the see at the confirmation of her election — on 8 March at St Mary-le-Bow — and assumed full duties upon her installation at St Paul's on 12 May.[3] On 15 July 2020, she acted as principal consecrator at the consecration of Hugh Nelson and Ruth Bushyager to the episcopate: this is a break in tradition with the Archbishop of Canterbury usually taking this role, and was the first time a female bishop had led a consecration service in the Church of England.[25]
Mullally is a self-described feminist and will ordain both men and women to the priesthood.[32] According to the Financial Times, Mullally "is seen as a theological liberal."[33] However, she also supports the inclusion in the Church of England of those who reject the ordination of women, stating upon her announcement as the next bishop of London; "I am very respectful of those who, for theological reasons, cannot accept my role as a priest or a bishop. My belief is that Church diversity throughout London should flourish and grow; everybody should be able to find a spiritual home."[34]
Mullally supports the Church of England's current teaching on marriage; that is between one man and one woman for life.[34] In September 2016, she became one of 10 bishops to make up the church's "Bishops' reflection group on sexuality".[35] In relation to same-sex relationships, she stated in 2017 that "It is a time for us to reflect on our tradition and scripture, and together say how we can offer a response that is about it being inclusive love."[34] When asked about LGBT people in the church, she further said that "What we have to remember is this is about people, and the church seeks to demonstrate love to all, because it reflects the God of love, who loves everybody."[36] In 2022, Mullally supported the observance of LGBT+ History Month and the launch of an Advisory Group aimed at advising the diocese on "pastoral care and inclusion of LGBT+ people in the life of our church communities".[37]
Mullally has described her views on abortion as favouring abortion rights although she would lean against abortion faced with her own decision. She has said that "I would suspect that I would describe my approach to this issue as pro-choice rather than pro-life although if it were a continuum I would be somewhere along it moving towards pro-life when it relates to my choice and then enabling choice when it related to others."[38]
In the 2005 New Year Honours, Mullally was appointed Dame Commander of the Order of the British Empire (DBE) in recognition for her contribution to nursing and midwifery.[42][43] Though Britishclergy who are appointed knights do not receive the accolade (dubbing with a sword) and therefore male clergy do not use the title Sir (unless knighted prior to their ordination), dames are not dubbed and so female clergy are free to use the title Dame.[40][44] However, it is her choice as to whether she is referred to as "Dame Sarah" and the honorific was often omitted when announcing her as the next bishop of London in 2017.[2][27][45][46][47][48]
^"England's chief nursing officer steps down this autumn. Nick Lipley reports". Nursing Management. 11 (4): 5. July 2004. doi:10.7748/nm.11.4.5.s5. PMID27712153.