›Summary
Irwin Mitchell is mapped by Sartori across 18 offices in 1 countries (National footprint), headquartered in London. Headcount band: 500–1,000 attorneys. Strongest mapped practices: Litigation & Disputes, Private Client & Estate Planning, Healthcare & Life Sciences. It appears in 5 Ranking Atlas pages. Profile compiled from public facts, last verified 23 Jul 2026.
01 — Public record
Facts on file
Compiled from public sources. Figures are shown as bands where exact counts are not published; nothing here is provided by the firm.
Website
Largest mapped office
London, GB
Professionals
500–1,000 attorneys banded
Countries covered
1 via 18 offices
Office footprint — mapped metros
18 offices · 1 countriesPrincipal practices
Bold chips mark the firm’s deepest mapped practices (major or strong).
Seniority mix — banded, fee earners
≈225 partners · <5 counsel · 350+ associates
Mapped from public bios and firm pages; exact counts are not published, so figures are shown as approximate bands.
Sartori Firm Index — footprint (a different lens from the Atlas tiers)
National · coverage 3 of 344.9
Composite SFI
SFI sub-index · banded
72.5
Scale
SFI sub-index · banded
26.8
Reach
SFI sub-index · banded
10.7
Hiring
SFI sub-index · banded
The Sartori Firm Index measures footprint and momentum (scale · reach · hiring), not practice quality. It never assigns an Atlas tier, and the Atlas never reuses this number — the two lenses are deliberately separate.
02 — Where this firm is ranked
Ranking Atlas & Firm Index
No composite firm score is published. Atlas tiers are assigned per market or practice from public footprint and evidence; the Firm Index leaderboards are a separate footprint lens.
7 listings · Atlas tiers apply only within their own market or practice
| Listing | Type | Tier | |
|---|---|---|---|
| Best law firms in United Kingdom | Atlas ranking | Market leaders | → |
| Best law firms in Birmingham | Atlas ranking | Established | → |
| Best law firms in Edinburgh | Atlas ranking | Notable in this field | → |
| Best law firms in Glasgow | Atlas ranking | Notable in this field | → |
| Best law firms in Leeds | Atlas ranking | Highly active | → |
| Sartori Firm Index — United Kingdom | SFI leaderboard | — | → |
| Sartori Firm Index — hiring now | SFI leaderboard | — | → |
03 — Sources & verification Last verified 23 Jul 2026 · next review by 23 Aug 2026 · change log
Public sources
- 1 Solicitors in London, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 2 Solicitors in Birmingham, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 3 Solicitors in Sheffield, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 4 Solicitors in Leeds, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 5 Solicitors in Manchester, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 6 Solicitors in Bristol, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 7 Solicitors in Newcastle, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 8 Solicitors in Chichester, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 9 Solicitors in Cambridge, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 10 Solicitors in Gatwick, Crawley Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 11 Solicitors in Liverpool, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 12 Solicitors in Southampton, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 13 Solicitors in London, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 14 Solicitors in Birmingham, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 15 Solicitors in Sheffield, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 16 Solicitors in Leeds, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 17 Solicitors in Manchester, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 18 Solicitors in Bristol, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 19 Solicitors in Newcastle, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 20 Solicitors in Chichester, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 21 Solicitors in Cambridge, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 22 Solicitors in Gatwick, Crawley Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 23 Solicitors in Liverpool, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 24 Solicitors in Southampton, Full-Service Law Firm | Irwin Mitchellfirm_website · 2026-07-21
- 25 Surgeon Who Carried Out Children's Hip Operations At Addenbrooke’s Hospital Cambridge Suspended After Review Finds Care Fell Below Expected Standardsfirm_website · 2026-07-21
Know the limits of this data
- —Figures are bands, not audited counts; public sources lag reality by weeks or months.
- —Atlas tiers are Sartori’s independent editorial opinion — not the firm’s claim, and not a client-satisfaction measure.
- —No firm-level numeric score exists; Atlas tiers apply only within their own market or practice.
- —No third-party legal-directory band is used as an input.
Corrections from the firm or its representatives are reviewed within five working days.
Change log
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Discuss a mandate →Irwin Mitchell is profiled here independently by Sartori. This page is not affiliated with, endorsed by, or produced in cooperation with the firm; firm names are used for identification only and no logo or brand assets are reproduced. Rankings reflect Sartori’s editorial methodology and public mapping — they are not legal advice, nor a recommendation to instruct counsel.