Add README for Nexus Financial Services example

This README provides an overview of the fictional implementation of an ISO/IEC 42001:2023 AI Management System for Nexus Financial Services, including details about the organization, files in the folder, and how to use the examples.

Author: Ankit-Uniyal

14-WORKED-EXAMPLE/README.md

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+# 14 — Worked Example: Nexus Financial Services
+
+## ISO/IEC 42001:2023 | Fictional Implementation Reference
+
+> **IMPORTANT NOTICE:** All organisations, individuals, AI systems, data, and scenarios in this folder are entirely fictional and created for educational purposes only. Any resemblance to real entities is coincidental. This content does NOT constitute legal, compliance, or professional advice.
+
+---
+
+## About This Folder
+
+This folder contains a **complete, filled-in worked example** of an ISO/IEC 42001:2023 AI Management System (AIMS) implementation for a fictional organisation: **Nexus Financial Services Ltd (NFS)**.
+
+These examples show practitioners exactly how to complete the blank templates found throughout this toolkit — with realistic, plausible entries rather than placeholder text.
+
+---
+
+## Fictional Organisation Profile
+
+| Field | Details |
+|---|---|
+| **Organisation** | Nexus Financial Services Ltd (NFS) |
+| **Industry** | Retail banking and consumer lending |
+| **Size** | ~3,200 employees, 14 branches across UK |
+| **Headquarters** | Manchester, United Kingdom |
+| **Regulatory Context** | FCA-regulated; subject to EU AI Act (cross-border), UK GDPR, Consumer Duty |
+| **AI System in Focus** | CreditIQ v2.1 — automated credit scoring and loan decisioning |
+| **AIMS Scope** | Development, deployment, and ongoing monitoring of CreditIQ v2.1 |
+| **Certification Goal** | ISO/IEC 42001:2023 Stage 2 audit within 18 months |
+| **AIMS Owner** | Chief Risk Officer (CRO) |
+
+---
+
+## Files in This Folder
+
+| # | File | What It Shows | ISO Clause |
+|---|---|---|---|
+| 1 | [README.md](README.md) | This overview | — |
+| 2 | [NFS-AIMS-SCOPE-STATEMENT.md](NFS-AIMS-SCOPE-STATEMENT.md) | Completed AIMS Scope Statement | Clause 4.3 |
+| 3 | [NFS-AI-SYSTEM-MODEL-CARD.md](NFS-AI-SYSTEM-MODEL-CARD.md) | Completed AI System Model Card for CreditIQ v2.1 | Clause 8.4, Annex A.6 |
+| 4 | [NFS-RISK-REGISTER-ENTRY.md](NFS-RISK-REGISTER-ENTRY.md) | Three fully populated AI risk register entries | Clause 6.1, Annex A.6 |
+| 5 | [NFS-INCIDENT-LOG-ENTRY.md](NFS-INCIDENT-LOG-ENTRY.md) | Completed AI incident log entry (bias detection event) | Clause 10.1, Annex A.9 |
+
+---
+
+## How to Use These Examples
+
+1. **Read the blank template** in the relevant clause folder first (e.g., `05-CLAUSE6-PLANNING/AI-RISK-REGISTER.md`)
+2. **Open the corresponding worked example** here to see a realistic completed version
+3. **Adapt the content** to your own organisation, AI systems, and risk context
+4. **Do not copy verbatim** — your AIMS must reflect your actual organisation
+
+---
+
+## Mapping to Blank Templates
+
+| Worked Example | Blank Template Location |
+|---|---|
+| NFS-AIMS-SCOPE-STATEMENT.md | `03-CLAUSE4-CONTEXT/AIMS-SCOPE-STATEMENT.md` |
+| NFS-AI-SYSTEM-MODEL-CARD.md | `07-CLAUSE8-OPERATION/AI-SYSTEM-MODEL-CARD.md` |
+| NFS-RISK-REGISTER-ENTRY.md | `05-CLAUSE6-PLANNING/AI-RISK-REGISTER.md` |
+| NFS-INCIDENT-LOG-ENTRY.md | `09-CLAUSE10-IMPROVEMENT/NONCONFORMITY-CORRECTIVE-ACTION-LOG.md` |
+
+---
+
+*ISO/IEC 42001:2023 AI Governance Toolkit | Worked Examples | See root README.md for full index*