Rock Climbing on The Great Stac of Handa in late May.

I have been pointed in this direction to search for permission to climb on this sea stack. The rules state that permission must be gained regardless of whether birds are nesting or not. I am unsure of who to contact to gain such permission.
if anyone has an email or phone number for how I would go about getting an answer for this, it would be much appreciated.
Thanks,

John