According to their submission
TAG Farnborough - Airspace Change Proposal | Consultation Farnborough handled 23,000 movements last year which is an average of 63 flights/day or 3 flights/hour based on a 20 hour operating day.
Must have counted the airshow traffic cos I didn't see anything like that when I stayed at the very nice TAG Hotel one weekend.
As the website helpfully points out, there are 22 days before the consulation closes.