I'm late to the debate, but the CAA website has a link to official statistics on movements, see
UK Airport Statistics: 2013 - annual | Aviation Intelligence | About the CAA
I've analysed Table 03 2 because I'm interested in the actual use of Doncaster Sheffield airspace. Farnborough seem not to be required to submit data routinely to the CAA!
Out of interest, in 2013 Doncaster averaged 13 movement per day, Norwich 67, and Humberside 34. Prompts questions?