Is Marfleet Analytical Services legitimate?
Yes. Marfleet Analytical Services Ltd is an active UK company incorporated on October 3, 2014, with a Hull laboratory, two named directors and a published peptide-testing menu with prices. On June 30, 2023 the UK medicines regulator (MHRA) issued a statement of GMP non-compliance and withdrew its two GMP certificates; this review found no public record of a later reinstatement or of a peptide-specific accreditation. Its ISO 9001 certification is a claim about its quality-management system, not ISO/IEC 17025 testing accreditation.
Main limitation: The MHRA withdrew its GMP certificates for a failed quality system in 2023, no later status was found, no peptide-specific ISO/IEC 17025 accreditation was identified, and no public lookup confirms a report.
Operator and accreditation
Operating identity
Marfleet Analytical Services Ltd, company 09248923, registered at Wyke House, Wyke Works, Hedon Road, Hull HU9 5NL, the same address as its contact page. Companies House lists it as active, incorporated October 3, 2014, with directors Martin Lee Barnard and Judi Ann Wilson. Marfleet Microbiology Ltd (company 14751749) is a separate company.
Accreditation scope
Marfleet says its quality management system is certified to ISO 9001:2015; no certificate or certifying body was identified. ISO 9001 is not ISO/IEC 17025 accreditation of specific tests. The UKAS directory search on November 13, 2026 returned only Marfleet Microbiology Ltd, a separate Driffield company accredited for microbiological tests on feeds, environmental samples and waters; no peptide, HPLC, endotoxin or heavy-metal method is listed.
Capabilities and submissions
Published peptide menu of more than 50 named peptides, with method development offered for others. Prices observed November 13, 2026: HPLC identity/purity/concentration from £120, LC-MS impurity profiling from £120, LAL endotoxin £95, ICP-MS heavy metals £95, bioburden £35, sterility confirmation £140. Samples are submitted through the laboratory's contact route; it says it does not sell peptide products.
Accepts samples submitted directly by customers.
Review findings
Who Marfleet is
Marfleet Analytical Services Ltd is an active private limited company registered in England and Wales (09248923) at Wyke House, Wyke Works, Hedon Road, Hull. Companies House dates its incorporation to October 3, 2014, which is the independently verified start. The laboratory's About page says Martin Barnard founded it in 2015; that account is Marfleet's own. Companies House shows Martin Lee Barnard as director since incorporation and Judi Ann Wilson as director since July 1, 2019, each a 25–50% shareholder.
Sources: Companies House overview · Companies House officers · Marfleet About us
Peptide services and prices
Marfleet markets independent peptide analysis to individuals, research organisations and businesses. Each assay is priced separately: an endotoxin result says nothing about sterility, and a purity-and-content report is not a metals report. Count only the panels printed on a certificate.
Sources: Marfleet peptide testing services · Marfleet contact
ISO 9001 is not ISO/IEC 17025
Even when verified, ISO 9001 describes how an organisation manages quality; it does not accredit the competence of a laboratory's specific tests. ISO/IEC 17025 does that, and in the UK it is normally granted by UKAS against a published scope of methods. Marfleet's About page says a UKAS application for its sister company Marfleet Microbiology Ltd, covering food analysis, is ongoing, while the UKAS directory already lists that company for microbiological tests. Neither entry covers peptide analysis, and no UKAS entry for Marfleet Analytical Services was found.
Sources: Marfleet About us (ISO 9001 and UKAS statements) · UKAS directory search for Marfleet · UKAS schedule, Marfleet Microbiology Ltd (28563)
The 2023 MHRA statement of non-compliance
On June 30, 2023 the MHRA issued a Statement of Non-Compliance with GMP (Insp GMP/IMP 46334/14567004-0007) for Marfleet's Hull site, following inspections up to May 17, 2022. The MHRA says the company failed to operate a compliant GMP quality management system and could not demonstrate that committed corrective and preventive actions were implemented or effective. The two current GMP certificates (0006 [H] and 0006 [V]) were withdrawn. The report names no data-integrity finding.
This is a dated record about medicines testing, not peptide research reports. No later MHRA record, remediation notice or reinstatement was found in the public sources reviewed, so Marfleet's current GMP status is not established either way. The October 15, 2021 certificate it withdrew is historical, not a current approval.
Sources: MHRA statement of non-compliance, June 30, 2023 · MHRA GMP certificate 0006 [H], October 15, 2021 (withdrawn)
What Marfleet's certificates look like
A Marfleet certificate is a two-page document. Page one prints the Date Issued, a Reference in the form MAS NNNNNN (newer files add a version such as v.2), product name, product code, batch number, date received, customer, originator, a results table with acceptance criteria and a vial photograph. Page two carries the analytical data and signatory block. The footer's form-control dates belong to the template, not the sample.
Reports reviewed print the submitting vendor as customer and originator. Most print batch N/A, so a report usually identifies product and strength but not a specific vial lot, and no chain of custody connects a result to a vial in hand.
Sources: Pure Peptides UK Quality Centre
Public-source review on November 13, 2026, not a site inspection or a commissioned test.
