Judicial Review – Statutory interpretation – Illegality – Whether the authority acted illegally –Irrationality – Whether the authority acted irrationally – Whether illegality and irrationality are equated in law – Effluent(s) – Absence of meaning in the Act – Use of a dictionary meaning – Secondary dictionary meaning – Environmental permit – Environmental licences – Object and purpose of the statute – Relationship between primary and subsidiary legislation – Presumption of correctness in statute – Whether provisions are mandatory or discretionary – Whether regulations are ultra vires the primary legislation – Whether public consultation should be conducted – Environmental Impact Assessment – Application for leave to apply for judicial review– Subsequent grounds added after the leave to apply for judicial review was granted – Marine Outfall – Development Order – Appropriate costs order