Topdrill Ltd

Topdrill Ltd is a ground investigation and geotechnical specialist based in Milton Keynes, supporting projects across the UK. Its work begins with understanding ground conditions and continues through site investigation, drilling, in-situ testing, laboratory analysis and factual or interpretative reporting.

The company provides a broad range of investigation techniques, including window and windowless sampling, rotary open-hole drilling, coring, dynamic probing, cable percussion drilling, trial pitting and concrete coring. Its engineers also undertake CBR, Clegg, standard penetration, plate bearing and soakaway testing, helping clients assess foundations, roads, drainage and wider development risks.

A notable capability is the LLAMR® lightweight limited-access modular rig, designed for difficult locations such as railway embankments, cellars, tunnels, power stations and sites beneath overhead cables. Topdrill also develops specialist equipment for ballast and trackbed sampling, while its geo-environmental team works on contaminated land, groundwater, remediation, risk assessment and waste management.

The company works with developers, landowners, funders, local authorities and infrastructure teams, including clients involved in railways, highways, housing, commercial development and remediation. Whether you are planning a new scheme, investigating unstable ground or need clear technical reporting, Topdrill combines practical site work with engineering and environmental interpretation.