Hi Dave, really sorry to hear that tragic news. I have read through the other responses, all of which seem helpful - especially Dick Barton's brilliant finding. I do hope that is useful for your needs. I lost a colleague a few years ago to the same horrible infliction that is Mesothelioma. Den Rayner, ex-Nav Instie, but on the Harrier fleet. Seems that he was informed that the highest probability for his case was exposure to asbestos during exercises, whilst he was located in the Admin Cabin within the Mk1 Hardened Aircraft Shelters (HAS) as a so called 'aircraft controller'; F700 management etc. I stress that he was specifically told that it was Mk1 cabins, and that it was likely to have been during his time at Gutersloh. Now I know that Laarbruch had Mk2 HAS system, I suspect that those at Coningsby and Leuchars might have been either Mk2 or 3, but I do not know if the same air feed configuration was used in all them. It might well have been! It seems that the filtration system blowing air through the Mk1 HAS was proved to be lined with asbestos. Hard to credit that the only source of so called fresh air into the Mk1 cabin was riddled with potential Mesothelioma causing spores. Most of us spent time in a HAS of some description.