This welcome intervention by a former PM may be even more significant than many of us realise. My memory of the occasion is hazy, but I think it was a chance remark by another former PM, Harold Wilson, many years after the event, which led to James Thain being cleared of blame for the Ambassador accident at Munich in the 1950s.
Sadly, it came too late for Capt Thain, who died a broken man, but it may have set a valuable precedent, and it can never be too late for those whom death has denied the opportunity to speak in their own defence.