It would appear up to last year the Herc was doing lower circuits
http://www.raf.mod.uk/rafbrizenorton...AA4264C911.pdf
This makes very interesting reading, Dec 2012
West Oxfordshire Planning Policy Consultations - Draft Local Plan October 2012 - View Comment
However, to the contrary, noise complaints have risen significantly (by around 4000%) since the arrival of the Hercules (C130) fleet of aircraft; this doesn’t reflect the true extent of the problem, as many people didn’t complain officially.
RAF Brize Norton - Environment