any tenuous link u can find to a farmer use it. i got permission on 1 farm and got more on the bak of it. its really as simple as dressing in tidy clothes (clean boots , jeans and a decent jumper ) , knocking on farms and asking. they will probably be gruff stern old gits but thats their way. once u get 1 it will lead to more so long as you play it right. whereever i go if they ask if i want a cup of tea i will take it. go in , talk boloks about weather, listen to them slag off local rugby team etc. so long as they dont think your taking the piss by just using them their alright. lots will say