The Doctors Laboratory (TDL) was established in 1987 to provide high quality pathology services with an emphasis on rapid turnaround times.

In 2002, The Doctors Laboratory (TDL) became part of Sonic Healthcare Ltd (SHL).  Sonic Healthcare is a diagnostic pathology organisation based in Sydney, Australia employing over 20,000 people in its operations worldwide, including Australia, New Zealand, UK, USA, Germany and Switzerland.  TDL operates as an independent laboratory within the Sonic group and is the largest provider of clinical diagnostic services in the UK. 

The trials unit (TDL Trials) was incorporated within the main facility during 2001 to manage clinical trial sample processing independent of the main Laboratory, whilst still utilising the state-of-art laboratory facilities, thus allowing samples to be processed rapidly in all disciplines. TDL Trials benefits from the wealth of services offered by the main laboratory, and as a result we are able to offer clients a 4 hour turnaround time for routine testing, 24 hours a day, 7 days a week, 365 days a year.  This allows principle investigators and site personnel to access volunteer’s safety parameters, vital to the continuation of all studies. TDL Trials emphasises the benefit of flexibility to provide a bespoke service where volunteer care is paramount.