Bit theoretical here but suppose you own field A which has access through a farmyard now sold off (dumb move but hey) and the new owners of the yard are a bit grumbly (as they always are) but are ok with the situation (as they should be). Now what happens if field B adjacent to field A (but beyond it) become available to buy/let and you want to access it through field A? Are you allowed? (I suspect not). I appreciate this is a bit vague so sorry. I guess would depend on wording of the document.