Operating identity
The operator is Marfleet Analytical Services Ltd, company 09248923, registered at Wyke House, Wyke Works, Hedon Road, Hull HU9 5NL, the same address as its own contact page. Companies House lists it as active and incorporated on October 3, 2014, with directors Martin Lee Barnard (appointed October 3, 2014) and Judi Ann Wilson (appointed July 1, 2019), each notified as holding 25–50% of shares and votes from September 1, 2016. Accounts to October 31, 2025 were filed October 30, 2026 and the latest confirmation statement is dated September 21, 2026. Companies House does not check the accuracy of what is filed. Marfleet's About page says Martin Barnard founded the laboratory in 2015; the 2014 incorporation is the independently dated event. The site also prints VAT number 197035488; that is the laboratory's own statement and was not validated against HMRC. Marfleet Microbiology Ltd (company 14751749, incorporated March 23, 2023) is a separate company.
Operating history and strongest evidence
A registered company with named directors, a published price list, numbered certificates that print the customer and originator, and a regulator's public record that confirms the laboratory and its address.
Accreditation scope
Marfleet says its quality management system is certified compliant to ISO 9001:2015; no certificate or certifying body was identified. ISO 9001 certifies a management system and is not ISO/IEC 17025 technical accreditation of specific tests. The UKAS directory search for Marfleet on November 12, 2026 returned only Marfleet Microbiology Ltd (customer 28563, Thorpe House, Driffield), accredited to ISO/IEC 17025:2017 on a schedule issued October 24, 2025 for microbiological tests on animal feeds, environmental samples and waters; that is a different company and site, and its schedule lists no peptide, HPLC, endotoxin or heavy-metal method. A bounded directory search does not exclude an accreditation under another name.
Methods and intake
Published peptide menu of more than 50 named peptides, with method development offered for others. Prices observed November 12, 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.
Public service record
Fat Pig Peptides names Marfleet as its laboratory and publishes 27 Marfleet reports; Pure Peptides UK's retained archive holds 47 Marfleet reports. This review did not establish other vendor clients or independent proficiency-testing results.
Important limits
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. Public-source review on November 12, 2026, not a site inspection or a commissioned test. Marfleet's ISO 9001 certificate, any later MHRA inspection, and its current regulatory status are not in the public record reviewed.
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 and describes more than 25 years of his pharmaceutical and food-industry experience; 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.
Companies House overview · Companies House officers · Marfleet About us
Peptide services and prices
Marfleet markets independent peptide analysis to individuals, research organisations and businesses and says it does not distribute or sell peptide products. Its page lists HPLC identity, purity and concentration from £120, LC-MS impurity profiling from £120, LAL endotoxin at £95, ICP-MS heavy metals at £95, bioburden screening at £35 and sterility confirmation at £140, as observed on November 12, 2026. Each assay is separate: an endotoxin result says nothing about sterility, and a purity-and-content report is not a metals report. Samples are submitted through the laboratory's contact route.
Marfleet peptide testing services · Marfleet contact
ISO 9001 is not ISO/IEC 17025
Marfleet says its quality management system is certified compliant to ISO 9001:2015. No certificate or certifying body was identified, so this is a self-reported claim. 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 for 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. The UKAS directory lists Marfleet Microbiology Ltd (a separate company, based in Driffield) as accredited for microbiological tests on animal feeds, environmental samples and waters, and neither entry covers peptide analysis. No UKAS entry for Marfleet Analytical Services was found.
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 UK Medicines and Healthcare products Regulatory Agency issued Statement of Non-Compliance with GMP, report Insp GMP/IMP 46334/14567004-0007, for Marfleet's Hull site. It followed inspections, the latest on May 17, 2022. The MHRA says the company failed to operate a compliant GMP quality management system, first identified at inspection 0005, and that over two later inspections it could not demonstrate that all corrective and preventive actions it had committed to were implemented, or that those implemented were effective.
The statement covers quality-control chemical and physical testing for human, veterinary and investigational medicinal products, including imported products. The action recorded is revocation, with withdrawal of the two current GMP certificates (0006 [H] and 0006 [V]), and marketing-authorisation holders were told to remove the laboratory from their authorisations by variation. The report names no data-integrity finding.
This is a dated record. It describes the regulator's position in June 2023 and concerns medicines testing, not peptide research reports. This review found no later MHRA record, remediation notice or reinstatement in the public sources reviewed, so Marfleet's current GMP status is not established either way. It is not a new finding of current non-compliance.
MHRA statement of non-compliance, June 30, 2023
The earlier 2021 certificate
The certificate the 2023 statement withdrew was issued October 15, 2021 after a July 6, 2021 inspection and covered the same chemical and physical quality-control testing. It carried a restriction that it could not support applications naming Marfleet as a contract testing laboratory for new manufacturing or marketing authorisations or variations. It is a withdrawn historical certificate and not a current approval.
MHRA GMP certificate 0006 [H], October 15, 2021
What Marfleet's certificates look like
A Marfleet certificate is a two-page document headed with the laboratory's logo and Hull address. Page one prints the Date Issued, a Reference in the form MAS NNNNNN, the product name, product code, batch number, date received, customer, originator, a results table with acceptance criteria, and a photograph of the vial. Page two prints the analytical data and the head-of-laboratory line, with an electronic-approval statement. The footer carries a form-control block whose dates are the template's, not the sample's. The one November 2026 PDF examined in detail (MAS 264881) names Christina Perry as the authorised person.
The reports reviewed print the customer's own name in the customer and originator fields, which ties a report to the vendor that submitted it. Most print batch N/A, so a report usually identifies the product and strength but not a specific vial lot.
Fat Pig Peptides certificate archive
Vendors that publish Marfleet reports
Fat Pig Peptides names Marfleet as its laboratory and publishes 27 Marfleet reports issued between August 6 and November 5, 2026. Twenty-five give a numerical purity from 92.47% to 100%, with four below 98% (92.47%, 93.86%, 96.48% and 97.32%); sixteen report measured content; nine include endotoxin and heavy metals. PeptidePrices reviewed all 27 and displays the COA verified label; Marfleet does not provide a public report lookup. Pure Peptides UK's retained archive holds 47 Marfleet reports.
Read each vendor's own review for its catalog, ratings and customer evidence. No other vendor is claimed to use Marfleet.
Fat Pig Peptides: independent UK laboratory testing · Fat Pig Peptides review · Pure Peptides UK review
How to check a Marfleet report
Marfleet publishes no report lookup, so the check is a direct request. Email enquiries@marfleetanalytical.com or call +44 (0)1482 714891 with the Reference, product name and batch number, and ask Marfleet to confirm the result and the Date Issued. The contact form has a Peptide Testing Enquiries subject. Compare the confirmed fields with the file you hold, including customer, strength and both pages.
Until Marfleet answers, a published copy is a vendor-hosted document that reads as consistent. Its numbers describe the submitted sample, and no chain of custody connects them to a particular vial.
Marfleet contact
