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ISO/IEC 17025 accredited by UKAS (No. 23262) testing laboratory (accreditation status: active). Located at 21st Century Pathology Ltd, T/A Path Lab, 10A Upper Wimpole Street, W1G 6LL, London, United Kingdom. Official accreditation scope: https://www.ukas.com/download-schedule/23262/Medical

ISO/IEC 17025 accredited by UKAS (No. 22197) testing laboratory (accreditation status: active). Located at 29 Fleet Street, EC4Y 1AA, London, United Kingdom. Official accreditation scope: https://www.ukas.com/download-schedule/22197/Medical

Ryedale Testing is a family-run building compliance specialist headquartered at Cedar Studio, 42 Town Street, Old Malton, North Yorkshire, United Kingdom. Established in 2007 and drawing on more than 35 years of combined experience in the building industry, the company delivers every service in-house without outsourcing, ensuring continuity of expertise and tighter project co-ordination from first instruction through to final sign-off. Operating nationwide across the UK, Ryedale Testing serves major volume housebuilders, tier-one main contractors, and smaller regional developers who need reliable, schedule-sensitive compliance testing on new-build and conversion projects. The company's flagship discipline is air tightness testing, conducted for both domestic dwellings and commercial buildings in strict accordance with ATTMA (Air Tightness Testing and Measurement Association) technical standards. Ryedale Testing is an accredited ATTMA member and uses only high-quality UKAS-calibrated instruments to measure air permeability. For new domestic dwellings, the regulatory threshold under Building Regulations Part L is typically 10 m³/(h·m²) at 50 Pascals, and the team provides pre-test advice and guidance to identify and seal air leakage paths before formal testing commences, significantly reducing the risk of failures and re-tests. A two-tier service model is offered: a standard programme with a 14-day lead time and an emergency service for projects where construction programme has slipped and handover deadlines are at risk. Acoustic testing constitutes the second major pillar of Ryedale Testing's portfolio. The company performs Pre-Completion Sound Testing to demonstrate compliance with Building Regulations Schedule 1 Part E and Approved Document E, covering both airborne and impact sound insulation of separating walls and floors in new-build residential and mixed-use schemes. All results are assessed against the minimum weighted sound reduction index values required for handover. Where project schedules allow, acoustic and air tightness visits can be co-ordinated on the same site visit, delivering programme and cost efficiencies for the site team. Broader noise assessments to address wider acoustic environment requirements are also available. Extract fan testing is offered both as a standalone service and as an add-on to air tightness visits. Mechanical ventilation extract systems installed in kitchens, bathrooms, and utility spaces must meet minimum flow rates under Building Regulations Part F, and Ryedale Testing provides independent measured verification of installed fan performance against those benchmarks. The company also delivers Standard Assessment Procedure (SAP) calculations and Energy Performance Certificates (EPCs) for new-build homes and residential conversions. SAP is the UK government's approved methodology for rating the energy and environmental performance of dwellings, and accurate SAP outputs are a prerequisite for Building Regulations approval and, in many cases, for planning discharge. Supplementary heat loss calculations for properties with high glazing ratios are likewise offered, helping design teams demonstrate thermal compliance where standard elemental approaches are insufficient. Ryedale Testing operates an in-house architectural services division spanning initial and detailed design, planning applications, building regulations submissions, specification writing, tendering support, and inspection of works in progress. This breadth of capability means clients can engage the company at concept stage and retain the same multidisciplinary team through construction and final compliance certification, reducing consultant hand-offs and programme risk. The integration of architectural services alongside compliance testing is a distinctive feature that sets Ryedale apart from single-discipline testing providers. The company's client roster features some of the most prominent names in UK volume housebuilding and contracting, including Keepmoat, Wates, Tolent, Wilmott Dixon, and Barratt Homes. Published testimonials from project directors and site managers at these organisations consistently praise Ryedale Testing's commitment to meeting handover deadlines — including working through the night and developing alternative testing programmes when standard approaches are insufficient — as well as their practice of resolving compliance issues and re-tests without imposing additional charges. This client-first culture, combined with a zero-outsourcing policy, distinguishes Ryedale from larger, more transactional competitors. With nearly two decades of operational history, ATTMA accreditation, UKAS-calibrated testing equipment, and a comprehensive in-house service offering spanning air permeability, acoustics, ventilation performance, energy rating, and architectural design, Ryedale Testing is a well-credentialled building compliance partner for any developer or main contractor operating under UK Building Regulations. Its base in Ryedale, North Yorkshire, and its established nationwide coverage across the UK make it readily accessible to projects throughout England and beyond.

ISO/IEC 17025 accredited by UKAS (No. 10779) testing laboratory (accreditation status: active). Accredited test areas include: Bio Sterility. Located at Accelerator Building, 1 Daulby Street, L7 8XZ, Liverpool, United Kingdom. Official accreditation scope: https://www.ukas.com/download-schedule/10779/Testing

ISO/IEC 17025 accredited by UKAS (No. 25321) testing laboratory (accreditation status: active). Located at 25 Harley Street, W1G 9QW, London, United Kingdom. Official accreditation scope: https://www.ukas.com/download-schedule/25321/Medical

AAT – Advanced Analytical Technologies S.r.l. is a specialized Italian contract laboratory founded in 2005 as a spin-off of the Catholic University of Piacenza (Università Cattolica del Sacro Cuore), located at Via Paolo Majavacca 12, in Fiorenzuola d'Arda (Piacenza), northern Italy. The company was created to respond to the rapidly growing scientific and commercial interest in functional foods, probiotics, and nutraceuticals by providing rigorously validated analytical and research services to food, pharmaceutical, cosmetic, and nutraceutical manufacturers. Its founding mission was to bridge academic microbiological science with the practical industrial need for reliable, accredited probiotic testing — a niche that at the time was severely underserved by conventional contract laboratories. The core testing service offered by AAT is the identification, characterization, and viability evaluation of probiotic bacteria in food products, dietary supplements, and pharmaceutical formulations. The laboratory specializes in the analysis of the most commercially important probiotic genera, particularly Lactobacillus (Lacticaseibacillus, Limosilactobacillus, Ligilactobacillus) and Bifidobacterium species, as well as other lactic acid bacteria used in functional food and supplement applications. Enumeration methods include culture-based colony-forming unit (CFU) counting on selective agar media, supported by flow cytometry for cell viability discrimination and molecular DNA-based approaches such as quantitative real-time PCR (qPCR) and digital PCR (dPCR), which allow strain-specific identification and enumeration even when closely related species are present in a mixed-strain formulation. These analytical methods are applied to tablets, capsules, sachets, fermented dairy products, beverages, infant foods, and animal feed matrices containing declared probiotic ingredients. AAT holds ISO/IEC 17025:2018 accreditation awarded by ACCREDIA, the Italian national accreditation body, under certificate number 1357L. The scope of accreditation covers microbiological test methods applied to food supplements for human consumption that are based on or contain probiotic bacteria, including culture-based counting of bifidobacteria and lactobacilli and adhesion-ability testing of probiotic strains to human cell lines. This accreditation provides customers with the independent, third-party-validated assurance required by regulatory agencies and retail buyers when substantiating the quality and label claims of probiotic products sold in Europe and internationally. One of AAT's most distinctive capabilities is its portfolio of in-vitro research models for pre-clinical studies of probiotic functionality. The laboratory has developed and, critically, accredited these in-vitro model systems under ISO/IEC 17025:2018 — making AAT, at the time of writing, the only laboratory in Europe to have obtained formal ISO 17025 accreditation for this category of tests. These models allow the study of interactions between human intestinal or skin cells, food ingredients, botanical extracts, and probiotic bacteria. Specific capabilities include adhesion and colonization assays on human intestinal cell lines, competitive exclusion testing against pathogenic bacteria, immunomodulation assessments, and barrier-integrity studies. Such in-vitro data form a critical part of the pre-clinical evidence package required when filing for health claims under EU Regulation (EC) No. 1924/2006 or when preparing regulatory dossiers for novel probiotic ingredients. AAT also provides analytical support to clinical trials studying the human and animal gut microbiome. Using next-generation sequencing (NGS) and other DNA-based molecular tools, the laboratory characterizes the composition and fluctuations of the intestinal microbiota in both healthy subjects and those undergoing treatment with pre- or probiotic supplements, pharmaceutical drugs, or specific dietary interventions. This service is offered to clinical research organizations (CROs), university research groups, and pharmaceutical companies conducting proof-of-concept or regulatory studies, and has been applied to research on conditions ranging from gastrointestinal disorders to metabolic health and immune function. Beyond pure analytics, AAT operates a dedicated R&D consulting division that supports clients throughout the full innovation cycle for probiotic and functional food products. Services include scientific strain selection — identifying superior microbial strains suited to specific target health benefits — pre-clinical functional characterization, formulation feasibility studies, design of stability protocols under accelerated and real-time conditions, and preparation of scientific dossiers for health claim applications submitted to the European Food Safety Authority (EFSA). The laboratory also works on skinbiotics (topically applied probiotic or microbiome-modulating ingredients for cosmetic use), extending its expertise into the cosmetics and personal care sector. AAT's scientific team has authored and co-authored peer-reviewed publications in international journals in the fields of microbiology, food science, and nutrition, contributing to the broader body of evidence on probiotic quality and functionality. AAT serves clients across the food and beverage industry, dietary supplement and nutraceutical manufacturers, pharmaceutical companies, cosmetics producers, and academic or clinical research institutions across Europe and beyond. The laboratory has participated in supranational collaborative initiatives with other independent accredited testing laboratories to establish harmonized methodologies and benchmarks for probiotic quality assessment — studies subsequently published in peer-reviewed scientific journals. With over two decades of focused expertise, ISO 17025 accreditation covering both routine microbiological testing and pioneering in-vitro models, and a strong publishing record in probiotic science, AAT represents a uniquely specialized and credible analytical partner for any organization requiring rigorous, evidence-based evaluation of probiotic products or ingredients.