How should men and masculinities be addressed in attempting to mainstream gender in planning and policy? To what extent has the shift from a Women in Development (WID) to a Gender and Development (GAD) approach helped unravel the complexities of gender and identity and their implications for implementing gender-aware development policy? In the training and advisory work undertaken at the Development Planning Unit (DPU), University College London, the experience of gender training has greatly contributed to the ways in which issues of men and masculinities, as well as women and femininities, have gradually been incorporated into the DPU’s methodology and training practice.