Agree!!
Have been to RIAT - enjoyed it with the NOISE et al., However, it cannot / does not match the 'music' of 'Merlins' and BIG radials et al.......
Whilst I cannot put 'numbers' on it, there are quite a lot who come from 'The Antipodies' simply to attend Duxford - and as many other airshow venues / museums as they can fit in as well.
I know 'we' did!
It IS 'the complete package'.....IMHO.
C'Mon IWM.....Catch up!!!