Our UK & Ireland Network
GSTL is part of Phenna Group's UK & Ireland network of specialist testing, inspection, certification and compliance businesses.
Our core services include laboratory testing of soils, rock, aggregates and concrete, together with nationwide site testing, drilling, sampling and coring. Through the wider Group, customers can also access complementary expertise when a project requires support beyond GSTL's own capabilities.
The network brings together established specialists serving infrastructure, buildings, industrial operations, scientific sectors and regulated organisations, creating clearer connections between related technical services.
Expertise across Phenna Group
Five divisions, one connected network
Phenna Group is structured across five specialist divisions. Each brings together businesses working in related industries and technical disciplines, enabling them to share knowledge, collaborate on complex requirements and help customers access a broader range of services.
Infrastructure
Supporting the planning, construction and long-term management of infrastructure assets.
Services include:
- Construction materials testing
- Ground investigation
- Geotechnical engineering
- Environmental chemistry
- Structural investigations
- Pavement investigations
- Site investigation
- Surveying and monitoring
- Asset management
- Ecology and archaeology
- Calibration services
Built Environment
Supporting the safety, compliance and performance of commercial and residential buildings.
Services include:
- Building control
- Building compliance
- Fire engineering
- Fire safety consultancy
- Water hygiene and treatment
- Energy compliance
- Building performance
- Building certification
- Specialist access
- Lift inspections
- Property compliance
Food & Life Sciences
Protecting product quality, consumer safety and regulatory compliance through specialist laboratory services.
Services include:
- Drug and alcohol testing
- Food testing
- Pharmaceutical analysis
- Veterinary diagnostics
- Environmental microbiology
- Water microbiology
- Laboratory services
- Hygiene consultancy
- Product certification
Certification & Compliance
Helping organisations demonstrate compliance, improve resilience and meet recognised standards.
Services include:
- Cyber certification
- Electrical certification
- Building certification
- Management systems certification
- Occupational health & safety
- Regulatory compliance
- Inspection services
- Technical assurance
Why this network matters for GSTL customers
Ground and construction projects can depend on several related services. Geotechnical test results may need to be supported by site investigation, environmental analysis, engineering advice, materials testing, structural assessment or long-term monitoring.
Customers can continue working directly with GSTL for laboratory and field testing while gaining access to complementary expertise from other trusted Phenna Group businesses whenever a wider response is required.
