I first learnt that Professor Blockley was going to be my PhD supervisor in Spring 1991. I started to search for his papers, completely unaware that there were award-winning papers, but I could not gather courage to contact him directly. However, once I met him in October 1991, all my apprehension was gone – he was so welcoming and kind. I became the newest member of the Civil Engineering Systems Laboratory that he had set up and soon learnt about his cutting-edge research into systems, process modelling, structural safety, uncertainty management and many others. David was incredibly inspiring – always thinking ahead and creating new research directions. The Interacting Objects Process Model (which David continued to pursue for joined-up thinking until recently) was put on the massively parallel Connection Machine for nonlinear dynamics and structural safety. After three fruitful and enjoyable years working with David (and Norman) for my PhD, I returned to India. However, less than a year later, I was back working with David as his research assistant and had the pleasure to do so for the next six years. No doubt, he had raised my intellectual curiosity through his exemplary research and insights over the years but more than that it was his caring attitude and respect that I will never forget. After a year out in industry, I was again back in David’s Systems Group – this time as a lecturer which would not have been possible without his kind support. David played a pivotal role in my working life and I remain indebted for everything he has done for me. Even after David’s retirement, I continued to benefit from his expertise. I feel very lucky to have known David and I will miss him greatly, as a mentor, colleague and friend. My deepest condolences to Karen, Andrew, Alison and David’s extended family.