Disaster Recovery Plan Template UK

Standard Operating Procedure: Disaster Recovery Plan (DRP) Framework

Document ID: SOP-TR-DR-2024-004
Effective Date: October 24, 2024
Version: 3.2.0
Review Cadence: Semi-Annual (Next Review: April 2025)
Author: Julian Vance, Chief Architect

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1. Executive Summary & Purpose

This Standard Operating Procedure (SOP) defines the institutional framework, governance structures, and operational workflows for executing a Disaster Recovery Plan (DRP) aligned with UK regulatory frameworks (including the UK GDPR, FCA operational resilience guidelines, and ISO 22301 Business Continuity Management standards).

The purpose of this document is to ensure zero ambiguity during catastrophic technical failures, cyber incidents, or physical data center outages. By enforcing strict RTO (Recovery Time Objective) and RPO (Recovery Point Objective) metrics, this SOP guarantees rapid restoration of mission-critical infrastructure, data integrity preservation, and regulatory compliance across all UK-based operations.

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2. Scope & Prerequisites

2.1 Scope

• Applies to all production environments, cloud-native deployments (AWS/Azure/GCP regions in eu-west-2 London), on-premises server racks in London/Manchester facilities, and hybrid routing architectures.
• Covers data recovery, identity provider failovers, transactional database restoration, and external API re-routing.

2.2 Prerequisites & Tools

• Administrative access to Infrastructure as Code (IaC) repositories (Terraform Cloud, AWS Control Tower).
• Active out-of-band communication channels (PagerDuty Enterprise, encrypted Signal bridge).
• Multi-Factor Authentication (MFA) hardware tokens for emergency root access.
• Read access to encrypted immutable offsite backups stored within UK territorial boundaries.

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3. Roles & Responsibilities (RACI Matrix)

(R = Responsible, A = Accountable, C = Consulted, I = Informed)

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4. Step-by-Step Procedure

Phase 1: Incident Assessment & Declaration

• 1.1 Verify telemetry anomalies via Datadog/Prometheus dashboards indicating a Level 1 (Catastrophic) systemic failure.
• 1.2 Convene the emergency bridge via PagerDuty within 5 minutes of automated alert tripping.
• 1.3 Assess RTO/RPO impact metrics against baseline thresholds (RTO < 60 mins, RPO < 15 mins).
• 1.4 Incident Commander formally declares a Disaster Recovery event, logging the timestamp in the audit trail.

Phase 2: Isolation & Safe Shutdown

• 2.1 Isolate compromised network perimeters using automated AWS Security Groups or firewall blackhole routes to prevent lateral movement.
• 2.2 Sever upstream API gateways to prevent dirty writes or corrupted transaction processing.
• 2.3 Take immediate forensic memory dumps of affected hypervisors or container clusters if a cyber incident is suspected.

Phase 3: Infrastructure Reconstruction (eu-west-2 Failover)

• 3.1 Initialize disaster recovery Terraform workspace targeting the secondary UK availability zone.
• 3.2 Execute terraform apply -auto-approve to provision ephemeral compute, storage, and networking layers.
• 3.3 Validate DNS failover routing tables via Route53/Cloudflare health-check overrides.

Phase 4: Data Restoration & Verification

• 4.1 Mount the latest immutable, encrypted snapshot from the secondary backup vault.
• 4.2 Execute automated database restoration scripts (pg_restore or engine-native equivalent) validating checksums.
• 4.3 Run automated smoke tests and transactional integrity checks to confirm zero data corruption.
• 4.4 DPO signs off on data privacy compliance and state validation.

Phase 5: Restoration of Service & Post-Incident Review

• 5.1 Re-enable public-facing API gateways and load balancers at 10% traffic capacity (Canary deployment).
• 5.2 Monitor error rates and latency metrics for 15 minutes; scale traffic linearly to 100% upon stability confirmation.
• 5.3 Schedule mandatory Post-Incident Review (PIR) within 72 hours for root cause analysis (RCA).

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5. Quality Assurance & Pro-Tips

Best Practices

• Immutability: Ensure all backup buckets have object-lock enabled in compliance mode to defeat ransomware encryption vectors.
• Geographic Separation: Maintain physical backup vaults at least 100 miles away from primary production data centers (e.g., primary in London, backup in Edinburgh).

Common Pitfalls

• Split-Brain Syndromes: Failing to sever the primary network completely before spinning up secondary databases, resulting in conflicting state writes.
• Stale Credentials: Relying on static infrastructure keys that expire or lack permissions in the secondary failover region.

Metric Thresholds

• Recovery Time Objective (RTO): $\le 60 \text{ minutes}$ from declaration.
• Recovery Point Objective (RPO): $\le 15 \text{ minutes}$ of data loss maximum.

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6. Frequently Asked Questions (FAQ)

Q1: What triggers the mandatory notification of the Information Commissioner’s Office (ICO) during a UK-based disaster recovery event?
A: If the disaster involves a confirmed data breach or unauthorized access to Personally Identifiable Information (PII) affecting UK citizens, the Data Protection Officer (DPO) must notify the ICO within 72 hours under UK GDPR regulations, regardless of infrastructure uptime status.

Q2: How do we handle authentication state loss if the primary Identity Provider (IdP) is unrecoverable?
A: The system architecture mandates a secondary read-only replica of the IdP stored in a segregated cloud environment. In a catastrophic failure, administrators switch IAM federation endpoints via pre-configured environment variable injection in the IaC configuration.