Within the context of a national shortage of high quality applicants for senior leadership posts, there is a need to nurture future leaders in Catholic primary and secondary schools and to promote their professional development and formation. If they are to be fully effective, teachers in Catholic schools need continually to develop their leadership skills and, crucially, they need to understand how they can best support the educational mission of the Catholic Church. This paper tells the story of the establishment and continuing development of a unique M-level programme, which sets out to combine a Catholic philosophy of education with the principles and practice of effective school leadership.