Just a bit of background info to whet your appetite;
https://en.wikipedia.org/wiki/RAF_Barnham
Keith Eldred, the owner of the quite rightly, scheduled monument, has told me that the tour is free, but donations for the upkeep are gratefully received.
More info from his last mail;
Directions from London direction :-
4 miles before Thetford on the A11 take the turning to Elveden. Cross back over the A11 go past the Elveden Inn and turn left at the crossroads. Go through village and take first turning to the right to Barnham. A mile and a quarter down the road turn left Gorse Industrial Estate. Go up the access road (300 yds) to the visitor car park where I will be waiting.
If from Norwich direction go round the Thetford By Pass then there is a slip road about 1/2 mile from Thetford sign posted Honington. Go down this about a mile and take first left to Barnham - then as above
From Bury St Edmunds travel on the A134 to traffic lights at Barnham turn left and Estate is three quarters of a mile on right then as above.
Postcode IP24 2PH
The tour can last up to 3hours and comprises short films and talks in the Visitor Centre – an hour’s tour of the site over rough grass – ending with a voluntary climb up a 30ft watchtower.
Looking forward to your visit
Cheers
Keith