rustle:
The question you've posed to IO540 is a very, very good one, and its answer may well be a pointer to how this IMCR issue pans out.
So, perhaps you would like to advise us as to how the various UK GA representatives should best address the question!
To do so impressively would remove any lingering doubts that many on here may have as to your actual feelings (such as "I've got an IR so I couldn't give a stuff"!).
There's value in posing the difficult questions, no doubt.
But providing credible answers is what really counts. Can you?