---
title: "CORSTON MEDICAL LTD — Ownership Dossier"
canonical: https://whiteintel.dev/entity/ccb429ea-6957-55e9-9c95-5b2889ca9cd9
json: https://whiteintel.dev/api/public/dossier/ccb429ea-6957-55e9-9c95-5b2889ca9cd9
identifier: oo:GB-COH-11778524
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# CORSTON MEDICAL LTD

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-11778524`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/ccb429ea-6957-55e9-9c95-5b2889ca9cd9  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/ccb429ea-6957-55e9-9c95-5b2889ca9cd9  

## Ownership & control

### Owners / controllers

- **Dr Sarah Margaret Mortimer** (beneficial owner) — 50% — https://whiteintel.dev/entity/f4bf14eb-f499-5f7c-97be-fc9e22a5bda0
- **Dr Alex Mark Mortimer** (beneficial owner) — 100% — https://whiteintel.dev/entity/6bfeb582-8d15-56a3-b7e0-98f7b8cd1238
- **Dr Sarah Margaret Mortimer** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/258d8aa4-e0d7-47e1-9689-718b285dbf41
- **Dr Alex Mark Mortimer** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/49ab2a0e-80b6-4660-a519-3c0691304822

### UBO chain (walk to the ultimate owner)

A **4-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Company profile (live · UK Companies House)

- **Company number:** `11778524`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2019-01-21
- **Registered office:** Corston Farmhouse The Green, Littleton-Upon-Severn, Bristol, South Gloucestershire, BS35 1NN, United Kingdom
- **SIC:** 86220

### Officers

- MORTIMER, Sarah, Dr — secretary · appointed 2019-01-21
- MORTIMER, Alex Mark, Dr — director · English · appointed 2019-01-21
- MORTIMER, Sarah Margaret, Dr — director · British · appointed 2019-12-18

### Beneficial owners (Persons with Significant Control)

- Dr Sarah Margaret Mortimer — 25–50% shares · individual PSC · United Kingdom — since 2020-03-05
- Dr Alex Mark Mortimer — 75–100% shares · individual PSC · United Kingdom — since 2019-01-21

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/11778524
- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/11778524

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **CORSTON MEDICAL LTD**. Human view: https://whiteintel.dev/entity/ccb429ea-6957-55e9-9c95-5b2889ca9cd9 · Structured JSON: https://whiteintel.dev/api/public/dossier/ccb429ea-6957-55e9-9c95-5b2889ca9cd9._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._