This is clearly either a mistake, negligence, or outright favouritism by Multiflight who may be authorised by the airport to collect landing fees but have no authority to allow free landings (unless by private agreement they intend to pick up the tab themselves.) All movements will have been logged by ATC and invoices raised by the finance division for landings during the normal course of events. If Multiflight are dispensing with landing and handling fees for certain selected operators then I would like to renegotiate my £8000 pa hangarage and handling contract with them, and while I am on, also renegotiate my home based operator contract with the airport for all future landings to be FOC.