Welcome to the Forensic Toxicology Service web site.

The forensic toxicology service is part of analytical Services International, based at  St. George's - University of London,

Tooting, South West London.


The Forensic Toxicology Service operates in a GLP/GCP compliant environment, accredited by the Department of Health.

We offer a service, research and training facility. We routinely measure drugs and endogenous compounds using a wide variety of specialist chromatographic techniques, immunoassays, and spectroscopic methods.

We provide specialist toxicological analyses at competitive rates, confidential and personal service.

The Forensic Toxicology Service is delivered by a highly trained team of scientists who contribute to the development of our service, research and training programmes. We support and encourage the continuous development our staff.

Solicitors, legal representatives or those working for public bodies who require opinions or written reports on drug-related matters, or analyses of samples in legal cases, should contact Professor Atholl Johnston or  Professor David W Holt, the Directors of the Analytical Unit

Bioanalytics and Forensic Toxicology

Please download our leaflet