Illegality

Simple ultra vires

ATTORNEY GENERAL V FULHAM CORPORATION

WESTMINSTER CORPORATION V LONDON AND NORTH WEST RAILWAY

AG V WILTS UNITED DIARIES

Error of law.

ANSIMINIC LIMITED V FOREIGN COMPENSATION COMMISSION

PERILLY V TOWER HAMLET BOROUGH COUNCIL

Error of fact.

EDWARDS V BAIRSTOW

EX PARTA KHAWAJA

E V SECRETARY OF STATE FOR THE HOME DEPARTMENT

UNLAWFUL DELEGATION

BARNARD V NATIONAL DOCK LABOUR BOARD

CORLTONA V WORKS COMMISSION

R V BIRMINGHAM JUSTICES

SECTION 101 OF THE LOCAL GOVERNMENT ACT 1972

Fettering discretion

EX PARTE KYNOCH LIMITED

BRITISH OXYGEN COMPANY V BOARD OF TRADE

R V NORTH WEST LANCASHIRE HEALTH AUTHORITY

Relevancy

EX PARTE VENABLES

EX PARTE WESTMINSTER CITY COUNCIL

Improper purpose

WEBB V MINISTER OF HOUSING AND LOCAL GOVERNMENT

EX PARTE WESTMINSTER CITY COUNCIL

PORTER V MAGILL

WHEELER V LEICESTER CITY COUNCIL