Good morning all,

I work in a business campus next door to 2 sensitive sites and will be doing drone photos every week to the end of 2023 of solar panel works and a building being built.
We were taking to the FM each of the sites and wonder is there a way to set up geofrencing on our campus to block other drones, but of course allow mine and people we trust.

If DJI puts an area in geofence it applies to all DJI drones without exception.  

Hi there. Thank you for reaching out. DJI is only the one who can decide to place an area in a NO-Fly Zone also, in accordance with local laws and regulations as we ensure safety on every flight of our consumers. For more information, you may visit our website at https://www.dji.com/flysafe or send an email to flysafe@dji.com regarding your request. Thank you for your valued support.

You can't,    you don't own the airspace only the land.    You would need to persuade the CAA they needed to do that