Dreadfully sad news. I had the pleasure of working with Kris shortly before his own 'Prime Minister's Questions' moment in the immediate aftermath of SDSR 2010. I can speak only as I found and he was good company, with a slight air of mischief (particularly if light blue uniform was involved); a proud member of the FAA, and above all an all-round good egg. The world is a little duller tonight for his passing.