Deeply saddened by his passing. Whenever I interacted with him while building a laboratory at Oxford and Diamond Light Source, UK, I felt in the company of “safe hands“ and a gentleness of spirit and deep insight and practicality for high pressure  techniques and scientific principles and  procedures, perhaps the best being the compilation of a software suite including the
ruby pressure scale and other tools for the experimentalist and newbie to double check one's own perspective and assumptions. A sincere man and physicist lost to our world, especially to that of compressed metals and simple molecular solids.

(Contributed by Andrew Jephcoat)