Internal Auditing Services · UK

Independent Internal Audit Services for Compliance & Audit Readiness

Internal audit services for retrofit contractors, training providers and compliance-focused organisations across the UK, assessing your systems, identifying gaps and preparing you for external assessment.

Why it matters

Why Are Internal Audit Services Important?

An internal audit services provides an independent review of how effectively your procedures and controls are working. Documented policies are not enough — organisations also need to demonstrate that procedures are followed consistently and that appropriate records and evidence are maintained. An internal audit can help you:

  • Identify weaknesses in internal controls
  • Check compliance with applicable standards
  • Review policies and procedures
  • Improve documentation and record-keeping
  • Identify potential non-conformities
  • Prepare for external certification audits
  • Improve operational processes
  • Review staff responsibilities and competence
  • Support corrective action planning
  • Strengthen ongoing compliance

Our audits focus on providing useful, practical findings rather than simply creating a checklist of problems.

Reviewing documents with a magnifying glass
What we offer

Our Internal Auditing Services

Audits based on your organisation’s activities, applicable requirements and audit objectives — covering conformity, non-conformity and opportunities for improvement.

Compliance Audits

  • PAS 2035 retrofit compliance
  • PAS 2030 installation requirements
  • ECO4 scheme requirements
  • ISO 9001 Quality Management
  • ISO 14001 Environmental Management
  • ISO 27001 Information Security
  • ISO 45001 Health & Safety

Risk Management Audits

  • Operational risks
  • Financial risks
  • Compliance risks
  • Reputational risks
  • Internal control weaknesses
  • Documentation gaps
  • Responsibility & accountability
  • Existing control measures

Process Improvement Audits

  • Internal workflows & procedures
  • Documentation & record-keeping
  • Staff competence & training
  • Equipment & materials
  • Responsibilities & internal controls
Standards & schemes

What We Can Audit Against

Depending on your requirements, our compliance audits can review your systems against the standards and scheme requirements most relevant to your organisation.

PAS 2035PAS 2030ECO4 SchemeISO 9001ISO 14001ISO 27001ISO 45001TrustMark
Reviewing records before an external assessment
Get ready first

Pre-Certification & Mock Audits

Preparing for an external certification audit without first reviewing your systems can lead to avoidable non-conformities. Our pre-certification and mock audits help UK organisations understand whether their systems are ready for formal assessment — giving you the chance to identify gaps, take corrective action and improve supporting evidence beforehand. We can support preparation for:

  • ISO certification body audits
  • PAS 2030 certification audits
  • ECO4 scheme administrator audits
  • TrustMark assessments
How it works

How Our Internal Audit Services Process Works

A structured audit process designed to provide clear findings and practical next steps.

1

Initial Consultation

Your organisationApplicable standardsExisting systemsAudit objectivesAppropriate scope
2

Audit Planning

Audit scopeCriteria & scheduleAudit checklistProcesses & procedures reviewed
3

Conducting the Internal Audit

Document reviewsProcess observationsStaff interviewsEvidence gatheringRecord checksProcedures & controls
4

Internal Audit Report

ConformitiesNon-conformitiesObservationsOpportunities for improvementCorrective action requirements
5

Follow-Up

Verify corrective actionClose non-conformitiesReadiness for external assessment
Built for the retrofit sector

Internal Audit Services for UK Retrofit Organisations

Retrofit contractors in the UK work within a compliance-focused environment involving detailed procedures, documentation, evidence and quality requirements. Our knowledge of PAS, ISO and retrofit-related requirements lets us provide internal audits that are particularly relevant to organisations working in this sector — assessing your systems against the agreed criteria and giving you clear findings that show where attention is needed.

  • Detailed procedures & documentation
  • Evidence & quality requirements
  • PAS, ISO & retrofit knowledge
  • Systems assessed vs agreed criteria
  • Clear findings & areas to address
  • Stronger preparation for external audits
Site inspection with a clipboard
Why Compliant Retrofits

More Than a List of Issues

A useful internal audit should give your organisation clear information that supports practical improvement — not just problems. Compliant Retrofits provides:

Experienced Internal Auditors

Audits carried out by people who understand management systems and how they are assessed.

PAS & ISO Knowledge

Working knowledge of PAS 2030/2035 and ISO 9001, 14001, 27001 and 45001 requirements.

Structured Audit Planning

A defined scope, criteria and checklist agreed with you before the audit begins.

Practical Audit Reports

Clear findings you can act on — not a jargon-heavy list of problems.

Actionable Recommendations

Guidance focused on realistic, relevant next steps for your organisation.

Pre-Certification Support

Mock and gap-focused audits that help you prepare for external assessment.

Corrective Action Follow-Up

Follow-up reviews to help verify identified issues have been addressed.

Retrofit-Sector Support

Particularly relevant to contractors and providers in the UK retrofit sector.

UK-Wide Support

Internal auditing support for organisations across the UK — not one region.

Who it’s for

Who Can Benefit?

The audit scope can be adapted to your organisation’s size, activities and compliance requirements.

Retrofit contractorsInstallation businessesTraining providersCompliance-focused organisationsBusinesses working towards ISO certificationOrganisations preparing for external assessmentsCompanies improving internal controlsBusinesses needing independent process reviews
Questions answered

Frequently Asked Questions

What are internal auditing services?
Internal auditing services involve systematically reviewing an organisation’s processes, controls, records and procedures against agreed audit criteria. Audits can identify non-conformities, control weaknesses, documentation gaps and opportunities for improvement.
Do you provide internal auditing services across the UK?
Yes. Compliant Retrofits provides internal auditing support for organisations across the UK, subject to the scope and requirements of each audit.
Can you help with ISO audit preparation?
Yes. We can conduct pre-certification audits and gap-focused reviews to help identify areas that may need attention before an external ISO certification audit.
Do you audit PAS 2030 and PAS 2035 requirements?
Yes. Internal audits can include PAS 2030 and PAS 2035 requirements for organisations operating within the UK retrofit sector.
Do you provide internal auditor training?
Yes. Compliant Retrofits also offers internal auditor training to help organisations develop internal auditing knowledge and capability.
How long does an internal audit take?
The duration depends on factors including the size of your organisation, audit scope, number of processes being reviewed and applicable standards.
How much do internal auditing services cost?
The cost depends on the size, complexity and scope of the audit. Contact Compliant Retrofits to discuss your requirements and obtain an appropriate quotation.

Book Internal Audit Services in UK

For ISO, PAS, ECO4, retrofit compliance, process improvement or pre-certification preparation, Compliant Retrofits can help. Book an initial consultation to discuss your requirements and determine an appropriate audit scope.