Andy was both a friend and a mentor who I have been very fortunate enough to work with over the last 10 years. He was the very first person I met when I arrived at the institute in 2009 and I was fortunate enough to become one of his first PhD students. He was an excellent researcher who brought innovation to the field of bioinformatics and to our understanding of breast and other cancers. His approaches and ideas were both novel and innovative and will continue to benefit cancer research and inspire future researchers for many years to come. Most of all he was a kind, caring and incredibly supportive mentor to me, not only during my PhD with him but throughout my career since then, and to all the many other students he supervised. He will be sorely missed by me and all those he worked with.