We are leaders in consultant-led diagnostics, innovation, value, and long-term investment in healthcare provision. We have over 30 years’ experience in the UK pathology market and have been working in partnership with the NHS for over 20 years.

Sonic Healthcare UK, which incorporates the TDL Group of laboratories and services, is part of the Sonic Healthcare group, one of the world’s largest clinical diagnostics groups with a demonstrated track record of medical excellence.

The Doctors Laboratory

The Doctors Laboratory (TDL) is the largest independent provider of clinical laboratory diagnostic services in the UK. We work with the NHS and the independent sector.

Health Services Laboratories

Health Services Laboratories (HSL) is a partnership between The Doctors Laboratory (TDL), Royal Free London NHS Foundation Trust (the Royal Free London) and University College London Hospitals NHS Foundation Trust (UCLH). It provides diagnostic pathology services to its NHS Trust partners and customers.

TDL Trials

TDL Trials provides highly specialised and regulatory compliant pathology services for clinical trials throughout the UK.

Cervical Screening London (CSL)

Cervical Screening London (CSL) is a cervical screening service provided for the NHS through a partnership between Health Services Laboratories (HSL) and London North West University Healthcare Trust (LNWUH).

HSL Advanced Diagnostics

Health Services Laboratories Advanced Diagnostics provides targeted cancer diagnostic services.

Sonic Healthcare

Sonic Healthcare is one of the world’s leading providers of medical diagnostics, with a reputation for excellence in laboratory medicine / pathology, diagnostic imaging / radiology and primary care medical services, across operations in Australasia, Europe and North America.