procedural impropriety
A failure on the part of a public authority to act in accordance with the requirements of procedural fairness and in compliance with the common-law rules of natural justice. In Council of Civil Service Unions v Minister for the Civil Service [1985] AC 374 (HL) the terms procedural impropriety, illegality, and irrationality were used by Lord Diplock to denote the common-law grounds or heads of judicial review of administrative action. Case: Bank Mellat v HM Treasury [2013] UKSC 38.

• pension attachment order
• pension sharing order
• peppercorn rent
• per autre vie
• per capita
• percipient witness
• per curiam
• peremptory challenge
• peremptory norm
• peremptory pleas
• perfect and imperfect rights
• perfect gift
• perfect trust
• performance bond
• performance of contract
• performers’ rights
• perils of the seas
• per incuriam
• periodic tenancy
• perished goods
• perjury
• Permanent Court of Arbitration
• permanent establishment
• permissive waste
• per my et per tout