I worked with Rajan when we were both serving on the committee of the Consultants' Network in the Institution of Engineering & Technology (2007-9 although it feels as if I've known him a lot longer!). I will always remember his bright, smiling eyes and penetrating questions. The IET CN also runs a discussion group, a loose association of some 300 engineering consultants in which Rajan also very active. His contributions were valuable, insightful and helpful, as was he. One of his passions was making organisations work together and he was the driving force behind the creation of the Joint Consultants' Forum which aimed to serve consultants from the various engineering institutions. He was also a very active member of the BCS which provided an important link between consultants in the two Institutions. On behalf of the CN committee members, the discussion group members, and myself, I'd like to record my thanks to Rajan for all he did for us and for engineering consultants. Keith Parr (Chair IET CN 2007-9)

Rajan and I spent our student days together first at Aston University, Birmingham and later at Imperial College, London. We shared "digs" and halls of residence in Birmingham and a flat in London with his brothers and others. We became firm friends taking summer holidays together and I was proud to have him to stand up as Best Man at my wedding. Life, work and distance have prevented us from meeting since those early days except when I was visiting family or on business trips to London and England. Rajan was a valued friend and will be remembered for the great times we had together. Dr. John Blomfield, Sidney, BC, Canada.

I knew Rajan only recently, as a valued member of the editorial board of OR Insight. He was a delightful person, and stimulating to talk with. I am sorry to hear he passed away, and am very moved by the tributes on this website and the obituary in the June issue of Inside O.R.