| Friern Barnet UDC v Adams [1927] 2 Ch 25 | Traditional bar on proceedings against unnamed defendants. | Cited as historical basis for general rule that claim forms require named defendants. |
| In re Wykeham Terrace [1971] Ch 204 | Earlier view that squatters could not be sued if unnamed. | Discussed; later authorities regarded the decision as wrong. |
| EMI Records v Kudhail [1985] FSR 35 | Representative actions including some unnamed defendants. | Illustrated limited exceptions where some defendants are identifiable. |
| Bloomsbury Publishing v News Group Newspapers [2003] 1 WLR 1633 | Opened jurisdiction to sue “persons unknown” described with sufficient certainty. | Contrasted with present case; here description did not identify anyone. |
| Brett Wilson LLP v Persons Unknown [2016] 4 WLR 69 | Alternative service by email on anonymous online publisher. | Example of service where defendant, though unnamed, was identifiable and contactable. |
| Smith v Unknown Defendant (“Likeicare”) [2016] EWHC 1775 | Same principle as Brett Wilson. | Cited for practicability of alternative service when identity unknown but contact possible. |
| Middleton v Person Unknown [2016] EWHC 2354 | Use of anonymous-defendant procedure in hacking context. | Illustrated modern expansion of jurisdiction. |
| PML v Persons Unknown [2018] EWHC 703 | As above; hacking/blackmail. | Part of survey of recent authorities. |
| CMOC v Persons Unknown [2017] EWHC 3599 | As above; cyber-fraud. | Same. |
| Hampshire Waste Services v Intending Trespassers [2004] Env LR 9 | Anonymous defendants in protest/trespass cases. | Illustrative only. |
| Ineos Upstream v Persons Unknown [2017] EWHC 2945 | Quia timet injunctions against unidentified protesters. | Illustrative only. |
| UK Oil & Gas Investments v Persons Unknown [2018] EWHC 2252 | Further protest-related anonymous defendant case. | Illustrative only. |
| South Cambridgeshire DC v Gammell [2006] 1 WLR 658 | Effect of injunctions on persons who later commit prohibited acts. | Supported distinction between identifiable and unidentifiable defendants. |
| Barton v Wright Hassall LLP [2018] 1 WLR 1119 | Service of process subjects defendant to jurisdiction. | Used to explain conceptual role of service. |
| Dresser UK v Falcongate Freight Management [1992] QB 502 | Court seized only upon service, not issue, of writ. | Cited to underline importance of service. |
| Porter v Freudenberg [1915] 1 KB 857 | Substituted service must be likely to bring proceedings to defendant’s attention. | Principal authority for requirement of notice; applied to reject alternative service on insurer. |
| Murfin v Ashbridge [1941] 1 All ER 231 | Comment (obiter) on possible service via insurer. | Discussed then distinguished. |
| Gurtner v Circuit [1968] 2 QB 587 | Substituted service and Motor Insurers’ Bureau. | Discussed then distinguished. |
| Clarke v Vedel [1979] RTR 26 | Court of Appeal refusal of substituted service on MIB where unlikely to reach driver. | Approved by Supreme Court. |
| Abbey National v Frost [1999] 1 WLR 1080 | Permitted substituted service on solicitors’ indemnity fund; treated as limited exception. | Supreme Court considered but declined to extend its reasoning to motor-insurance context. |
| Bovale v Secretary of State for Communities [2009] 1 WLR 2274 | Status of practice directions vs. rules. | Used to show PDs cannot override general law. |
| Abela v Baadarani [2013] 1 WLR 2043 | Purpose of service is to inform defendant. | Reinforced necessity for service bringing notice. |
| Anderton v Clwyd CC (No 2) [2002] 1 WLR 3174 | Dispensing with service only when defendant already aware. | Guided discussion on CPR 6.16. |