Experts In Ground Investigation

Established in 1961, we are the UK’s largest, privately owned, independent, ground investigation contractor, providing quality geotechnical and geoenvironmental data throughout the UK. We deliver an extensive range of ground investigation services for the purpose of informing on the physical and engineering properties of the ground (soil & rock), and any potential contamination issues. Our offering is complemented by a dedicated surveying team that provide utility tracing and detection services and our in-house, accredited soil and rock testing laboratory.

Why Choose Us?

Because you can rest assured that we are renowned for our standards, taking pride in our accreditations which include ISO, UKAS, RISQS and UVDB to name a few. We take a no-nonsense, safety-first approach to all our ground investigation processes, giving you the confidence and reassurance that your project is in safe hands and completed to the highest professional and technical standard.

Our investment in R&D and our innovative approach to rig and plant development and use of information technologies differentiates us from our competition. We welcome the prospect to engage with you at the earliest opportunity to advise and assist in the site investigation planning and provide a cost-effective approach. We pride ourselves on our delivery of robust, quality data to help mitigate the ground risks associated with your project.

All Under One Roof

From utility surveying and vacuum excavation through to intrusive ground investigation and soil/rock testing, complete with geotechnical and geoenvironmental reporting. We do it all!

Tell us what you need


Our UKAS accredited laboratory offers an extensive range of geotechnical testing for both soils and rocks including testing for aggregates and earthworks. We provide classification testing through to effective stress and ring shear testing in accordance with BS1377 and BS EN ISO 17892. We also offer a range of tests on rock, following ISRM Standards. Our quality system is certified to ISO 17025.

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& Utility Tracing

Our team is highly experienced in utility detection, mapping and topographical surveying. We use the latest sub-surface technologies including electro-magnetic locating (EML) & ground penetrating radar (GPR), together with traditional survey techniques and CCTV inspections, to provide you with a complete solution for utility mapping & detection.

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We boast a 150+ strong, multi-disciplinary team of geologists, engineers, drillers, lab technicians and surveyors and an impressive fleet of 29 technologically advanced rigs including our in-house designed P60 slope climbing rig. Together with our accreditations and in-house experience, we have the resources and capabilities to take on a variety of ground investigation projects from simple trial pit investigations to multi-million pound major schemes.

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  • We never accept that something can’t be improved.
  • We make use of service quality information including feedback from clients, discussions with other contractors, suggestions from our staff as well as keeping our eyes and ears open to the deliberations of the research community.
  • Ultimately, we’re looking for innovations that will give you even better value for money, as well as improved safety, less disruption and a speedier service, without ever compromising the quality of information or advice we give.
  • We’ve designed a number of unique rig systems specifically to meet our clients’ requirements, including our award-winning P60 slope climbing rig.