chappie
By all means talk to Angus and/or Channel 4 News - can't possibly do any harm! As far as Duxford is concerned, my experience of them (we're doing their commentaries this year, though not Flying Legends) is that, because they are part of Imperial War Museum, they are very careful about not offending the guvmint. Their definition of 'offending' seems pretty widely drawn!
However I will PM you with a contact - once again, no harm trying.
Good luck.....
airsound