What I am going to paste below is a copy of a document I use called "Authority to Shoot". I don't remember exactly where I got it from but it seems to cover most of the legal requirements we would all need. I hope it comes out ok when I give it a go.
If it works just copy and paste into Word and print out.
AUTHORITY TO SHOOT
I (name)………………………… of (farm) ………………………………………
In my capacity as, Landowner, Tenant, Estate Manager, Game Keeper (delete)
Address …………………………………………
………………â