Sorry Finn, my grammars not great,but think you know what I meant.West Mercia, if contacted by another force ref an invite or bought night used to be very very reluctant to ok it.
They were more than helpfull and 100% if you had your own ground.
And from my experiences, other police forces wanted permission from actual landowner,in writing.
And, W.Mercias thoughts on that wasn`t too good, as like they told me, means loads of people ended up with permission on a piece of ground in Hfds.
So I always found it easier to supply nights hunting, a rifle or 2 and one or two pigs.