19. We add that the public interest also requires that there be an end to litigation: interest reipublicae ut sit finis litium. This time-honoured legal principle underpins common law rules preventing further litigation of issues which have already been the subject of adjudication between parties. We do not suggest that any of those rules apply squarely to this case: but the spirit of them certainly does. However odious the proposed broiler farm may appear to the requestors to be, the permit holders have rights at law which must be respected. For more than two years now they have been attempting to secure, then to protect, the right to use their land for this particular purpose. They fought, and won, a six day case in this Tribunal more than a year ago (a twenty-eight page decision was published, including six pages of conditions). They successfully opposed an application by the responsible authority and Mr Koutroubas, on behalf of the requestors, for leave to appeal that decision. They successfully opposed an application by the responsible authority, at the urging of the requestors, for cancellation or amendment of the permit. They are now called upon by, in reality, the same interests to ventilate the same issues yet again.