Jackyboy,
As advised, you will need a slot allocated. Phone Duxford after 1000 local and they will provide detail. However, as previously mentioned, you will need to affirm that you have read AIC Pink 72 so read it before calling.
Find it here:
http://www.ais.org.uk/aes/login.jsp
Once you have logged in it's under Docs/AIC.
Duxford Ops is 01223 833376
The AIC states that visiting A/C may not leave before the show finishes but, you never know, they're pretty flexible.....
Hope to see you there.
Strake
By the way, as of Sunday 5/10, there were still plenty of slots available