There does seem to be a blockage in AAIBs reports. I bought a write off which had suffered a tail rotor strike in May 08. Pretty non contentious. No injuries. 'Res ipsa loquitur' engineering wise yet still no report.
No critiscism of AAIB intended. They may well be busy with more important stuff.
I called them a while ago to see if I could get back some of the parts they took and they told me the result was still some months off.