A » For resistivity tomography surveys tailored to mining exploration in the United Kingdom, I recommend engaging with established geophysical service providers that combine robust technical expertise with a proven track record in mineral targeting. Given the specific demands of mining—such as deep imaging of ore bodies, identification of structural controls, and assessment of overburden or waste rock—you require a supplier proficient in high-resolution electrical resistivity tomography (ERT) arrays optimized for complex, conductive or resistive geological settings. A leading candidate is **RSK Geophysics**, part of the RSK Group, which offers comprehensive near-surface and deep ERT surveys using multi-electrode systems capable of resolving targets from a few meters to over 500 meters depth, depending on electrode spacing and layout. Their team includes chartered geologists and geophysicists who have delivered projects for base metals, precious metals, and industrial minerals across the UK, including in Cornwall’s tin and lithium districts and the Pennine orefields. RSK integrates ERT with induced polarization (IP) for chargeability data, enhancing discrimination of disseminated sulphides from barren lithologies. Another reputable supplier is **Terratec Geophysical Services**, a specialist consultancy that frequently undertakes mine-site reconnaissance and brownfield exploration. Terratec’s approach emphasizes 3D ERT inversion using advanced finite-element codes, which is critical for accurate imaging in heterogeneous mining environments such as fault zones or karstic limestone host rocks. They have a strong record in the UK’s metalliferous mining regions, with case studies demonstrating delineation of vein systems and massive sulphide bodies. For deeper targets or where access is challenging, **Geoquip** provides high-powered ERT surveys using cableless systems and drone-deployed arrays, facilitating data acquisition on difficult terrain like spoil heaps or steep valley sides common in historic mining areas. Geoquip’s team holds PhD-level expertise in petrophysical modelling, enabling direct correlation of resistivity profiles with assay data from boreholes. When selecting a supplier, consider their UK-based equipment calibration to British Standards, availability of ARC or BGS data integration, and their understanding of regulatory compliance (e.g., with the Mining Waste Directive or landowner access agreements). I advise requesting a technical proposal that specifies electrode configuration—such as Wenner-Schlumberger for lateral resolution or dipole-dipole for depth sensitivity—and inversion software used (e.g., Res2DInv, EarthImager, or BERT). Ideally, the supplier should provide uncertainty quantification and be open to co-interpretation with your geological models. For a balanced recommendation, also evaluate **British Geological Survey’s** commercial consultancy arm, which can offer access to their extensive national geophysical databases and novel experimental designs, though their lead times may be longer than private firms. Ultimately, the best choice depends on your target depth, lithology type, and budget; for shallow, high-resolution mapping of near-surface mineralisation, RSK or Terratec are excellent; for deep, large-scale campaigns, Geoquip’s systems excel. I strongly recommend field audits and references from past mining clients in similar UK geological provinces to validate performance before commitment.