Perhaps a contact here?
Real Aeroclub De Córdoba - Local Business | Facebook or here?
aeroclub.in or there's always LEMO if you've some US air force contacts.
Gibraltar? A theoretical twenty minutes longer by car than from Malaga.
Thinking of which, you could always drop a note to the Spanish Air Attache at the embassy in London, telling him that you represented the Free Rock Society, whose membership was composed of Poms who wanted to hand Gib back to its rightful owners. You're on a fact finding mission to Spain so that you can make a presentation to your members on return of Spain's local fitness to govern the inhabitants of Gibraltar? (Rather like the British attitude to Greece and the Elgin Marble). Might you please have clearances to land and leave at LEMO for a few days while you carried out your research in the interests of furthering Anglo-Spanish relationships?
The Spanish navy has been particularly good to me in the past.