The use of drones is a complex matter and you need to ensure you are aware of regulations before you consider using a drone in a public place.  All drone operators now have to be registered.  It is possible to use some drones (lighter weight) in public areas, but it is unlikely a a larger drone can be used safely in a public space and so the Trust does not give general permission for drones to be used.  Commercial photography of any kind (this includes wedding photography) needs prior permission of the Trust.  Due to the safety issues involved and admin oversight needed from the Trust, it is unlikely the Trust will give permission for commercial photography using drones at the present time.