In reply to Alan James - UKC: my guess is that he's trying to ensure that the site does not have any potential for access rights to be established. A common tactic of protestors to any development proposal is to claim rights of way, common land, even village greens to fragment and devalue a site in the eyes of potential investor/developers. The only way you can definitively prevent this is to demonstrate that you can close access, and even then, there may be enough historical evidence for a retrospective claim.