The audio file referred to by Chug is from a BBC Radio 4 piece on systemic airworthiness failings, by Angus Stickler, on 2 September 2009. It includes an interview with Lord Trefgarne, who commissioned the Tench report, and is referenced in The Inconvenient Truth. Trefgarne talks of his 'despair' at the report being suppressed. The main obstacle was CAS, ACM Craig; who, as Lord Craig, fought hard against the Chinook pilots.
Later that day, defence minister Kevan Jones was also interviewed. He accused one contributor in particular, a retired Sqn Ldr who is here on pprune, of only speaking out after he retired - claiming he did not say anything while serving.
This was an outright lie. In fact, it was his evidence to the Wiltshire Coroner David Masters a few years earlier that revealed he (the Sqn Ldr) had been party to a formal report warning of the risk of C-130s not having Explosion Suppressant Foam. MoD denied the existence of the report, and in fact any knowledge of ESF prior to the XV179 accident. Yet again, a Coroner chose to believe the hard evidence, particularly two MoD ESF specs from around 1970.