Chain of Custody Drug Test in London
Book a professional chain of custody drug test with documented sample collection, handling and laboratory testing procedures. This urine drug test is suitable for workplace, legal, court, visa and professional requirements where traceability is important.
Appointment only. Negative results are usually available within 2 working days*. Positive results require confirmatory testing and may take a further 5 working days.
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Overview of the Test
The Urine Drug Test with Chain of Custody is a professional urine drug screening test designed for situations where sample identity, handling and reporting need to be documented.
This test screens for multiple drug groups, including amphetamines, benzodiazepines, cannabinoids, cocaine, opiates, methadone and other commonly requested substances. The chain of custody procedure helps track the sample from collection through to laboratory analysis.
This type of test is often requested by employers, including TfL, courts, legal representatives and organisations requiring formal evidence of drug testing. It may also be requested for some overseas work or visa purposes, including USA and Sweden-related work requirements.
Who Is This Chain of Custody Drug Test For?
This chain of custody drug test near me service is suitable for individuals and organisations who need formal urine drug testing with documented sample traceability.
Legal Purposes
Suitable for court cases, legal disputes or formal requests where a documented drug testing process may be required.
Workplace Drug Testing
Commonly used for workplace drug testing, occupational requirements, regulatory standards and employer-led testing policies.
Visa or Work Requirements
May be requested for work, travel or visa purposes where formal drug testing and chain of custody documentation are required.
Substances Tested and Cut-Off Levels
This chain of custody urine drug test screens for a broad panel of substances using defined laboratory cut-off levels.
| Substance |
Cut-Off Level |
Examples |
| Alcohol |
40 mg/dL |
Alcohol |
| Amphetamines |
300 ng/mL |
Amphetamine, methamphetamine, MDMA, ephedrine |
| Barbiturates |
200 ng/mL |
Barbiturates |
| Benzodiazepines |
200 ng/mL |
Diazepam, nitrazepam, lorazepam, alprazolam |
| Cannabinoids |
50 ng/mL |
Cannabis, marijuana |
| Cocaine |
150 ng/mL |
Cocaine |
| Opiates |
300 ng/mL |
Morphine, codeine, dihydrocodeine |
| Ketamine |
100 ng/mL |
Ketamine |
| LSD |
500 pg/mL |
LSD |
| Methadone |
100 ng/mL |
Methadone |
| Methaqualone |
300 ng/mL |
Methaqualone |
| Phencyclidine |
25 ng/mL |
PCP |
| Propoxyphene |
300 ng/mL |
Propoxyphene |
This panel supports comprehensive testing for commonly requested substances in workplace, legal and professional drug testing settings.
Sample Type
This is a urine-based drug test with chain of custody procedures. Urine testing is commonly used to help identify markers linked to recent substance use across a defined detection window.
Chain of Custody Drug Testing Procedure
The chain of custody drug testing procedure is designed to document the sample collection and handling process from appointment through to laboratory analysis.
1. Make an Appointment
Appointments are available Monday-Friday, 9:00 AM-3:00 PM. After payment, you will receive a confirmation email with booking instructions, a map and directions to the testing location.
2. Attend Your Appointment
Visit Patient Reception at The Doctors Laboratory with valid photo ID, such as a passport or driving licence, and provide your sample at the scheduled appointment time.
3. Provide Accurate Details
Please ensure your contact details include a valid mobile phone number to help avoid delays in your appointment confirmation.
› Read more about Chain of Custody Tests
Period of Detection
Detection periods vary depending on the substance, frequency of use, individual metabolism, hydration and other factors.
Amphetamines and Cocaine
Typically detectable for around 1-3 days.
Cannabinoids
May be detectable for 1-30 days, depending on usage frequency.
Other Drugs
Typically detectable for around 1-4 days.
› How long can drugs be detected in urine and blood?
Results and Turnaround Time
Results are delivered securely by email. All results are supervised by a doctor before being issued.
Negative Results
Usually available within 2 working days*.
Positive Results
Confirmatory testing is required and may add a further 5 working days.
Results cannot be provided over the phone because caller identity cannot be verified.
*Turnaround time may vary depending on sample collection time and laboratory processing.
Why Choose Drug Test London?
Documented Procedure
Chain of custody procedures help support clear sample tracking and formal reporting requirements.
Suitable for Formal Requests
Appropriate for workplace, court, visa and professional drug testing where traceability is required.
Secure Results
Results are delivered securely by email and reviewed before being issued.
Book Your Test
Frequently Asked Questions
What does chain of custody mean for drug testing?
Chain of custody means the sample collection, handling and transfer process is documented to help show that the correct sample has been collected and tracked through the testing procedure.
What is a chain of custody drug test?
A chain of custody drug test is a drug test where the sample is collected and processed using documented procedures. It is often used for workplace, court, visa or professional requirements.
What is a chain of custody form for drug testing?
A chain of custody form is used to record key details about the donor, sample collection, handling and transfer process. It helps support traceability during drug testing.
Is this suitable for workplace drug testing?
Yes, this test may be suitable for workplace drug testing where formal sample tracking and documented results are required. Employers should ensure their workplace testing policy is appropriate and legally compliant.
Do I need photo ID?
Yes. You must bring valid photo ID, such as a passport or driving licence, to your appointment. This supports sample traceability and helps confirm your identity.
How quickly will I receive results?
Negative results are usually available within 2 working days. If an initial result is positive, confirmatory testing is required and may add a further 5 working days.
