Having had a browse through the IWM site, it might be an idea to try using:
[email protected]
According to the IWM site, if you send an e-mail to that address, with the name of a member of staff in the subject line, said member of staff (or, presumably, their secretary) will deal with it .
It might be improper of me to give the name of the relevant member(s) of staff, but anyone going
here will find a handy list from which to choose. The Duxford names are about halfway down the page.
I'm sure that the senior bods in a publicly funded organisation wouldnt' object to receiving the views (if expressed politely, of course) of some of us wot fund it...