This is a very interesting question.
I thought last year I had it sorted via the Agent for Lord Derby but then it fell apart with I think internal issues as one hand seemed not to know what the other was doing.
I then spent some days asking around for access to fields adjoining the managed moorlands but it is very far from straightforward as the obvious owner of field x does not by a long chalk live at the obvious farm house... very complex and after a while I got a bit sick of it to be honest.
I may try this year again but as we are hoping to move soon I am not so sure about bothering.
PH