| Term | Definition |
| R v Lord Chancellor ex p Witham | court fees - simple ultra vires |
| Anisminic v FCC | error of law |
| R v Lord President of Privy Council ex p Page | all errors of law are reviewable |
| Re Racal Communication | exception to all errors of law reviewable - special system of rules (P expressly provided first instance decision to be final) |
| R v Monopolies Commission ex p S Yorkshire Transport | exception to all errors of law reviewable - pwr capable of broad interpretation ('substantial' has different meanings) |
| White and Collins v Min of Health | error of fact - precedent - whether land was parkland |
| R v SOS HD ex p Khawaja | error of fact - precedent - illegal entrant? |
| Colleen Properties v Min of Health & Local gov't | error of fact - no evidence - Min refuse purchase of property |
| Mahon v Air New Zealand | finding of fact must be based on some material that tends logically to show existence of facts consistent with finding |
| SOS education v Tameside MBC | error of fact - mistake/ignorance - grammar school |
| R v CICB ex p A | error of fact - mistake/ignorance - police testimony vs med records |
| E v SOS HD | error of fact - mistake/ignorance - harm if sent back to country (4 reqs) |
| R v Somerset CC ex p Fewings | abuse disc - relev/irr - stag hunting |
| Roberts v Hopwood | abuse disc - rele/irr - council paying higher than avg wages |
| R v SOS HD ex p Venables | abuse disc - rel/irr - public clamour |
| R v Gloucester cc ex p Barry | abuse disc - rel/irr - 'needs', could consider resources |
| R v CICB ex p P | abuse disc - rel/irr - court not equipped to deal with decisions re allocation of resources |
| R v East Sussex CC ex p Tandy | abuse disc- rel/irr - 'suitable educ' (objective), can't consider resources |
| Padfield v Min of Agriculture | abuse disc - improper - ignored complaint |
| Congreve v Home Office | abuse disc - improper - tv license |
| R v SOS HD ex p Fire Brigades Union | retent disc - fettering - can't intro new stat scheme inconsistent what was on table |
| R v SoS enviro ex p Brent | keep mind ajar |
| British oxygen v board of trade | rigid policy may be allowed if evidence individual cases decided on merits |
| r v warwickshire cc ex p collymore | policy on student grants, flexible but no grants ever given |
| R v NW Lancashire HA ex p A | transgender ops always refused |
| R (Corner House Research) v director of sfo | submission to threat only lawful if no alt course |
| R v SoS HD ex p, ex Q | fettering and hr - removing child of prisoner was disproportionate |
| Lavender v Min of Housing & local gov't | retent disc - gr: not allowed to delegate (unless expressly in statute) |
| Carltona v Commissioners of Works | exception- reverse presumption against delegation - Minister allowed to delegate to officials in dept even w/out express statement in statute |
| R v SOS HD ex p Oladehinde | immigration inspectors = civil servs so come under carltona principle |
| R v SOS HD ex p Doody | limit to carltona - where fund right at stake, can't delegate below jr min |