Test tubes in a rack with sample being taken from one of them

Frequently Asked Questions Old


drug-test  How do I know which is the correct drug test for me to do?

A simple urine test without a Chain of Custody is the routine and most cost-effective test to do. In certain cases, companies request a urine drug test with a Chain of Custody as part of their pre-employment procedure; e.g. Transport for London (TFL), or for legal reasons. This will be written on their letter to you. 

chain-of-custody  What does “Chain of Custody” mean?

The chain of custody is the chronological documentation or paper trail, showing the collection, transfer, receipt, analysis, storage, and disposal of the test sample. This is to make sure that any results that are reported definitely belong to a particular person. You will need to bring a photo ID with you like a passport or driving license when attending for this type of test.


    appointment-drug-alcohol-test  Do I need to make an appointment for the test?

    An appointment is required only for the urine drug test with a Chain of Custody. All other tests need no appointment and clients can attend Patient Reception at The Doctors Laboratory between 7am-7pm on weekdays and 9am-5pm on Saturdays.


    location-where-drug-alcohol-test  Where do I go to do the test?

    Once you have ordered the test, you need to go to Patient Reception at The Doctors Laboratory at: 76 Wimpole Street, London, W1G 9RT.


    pay-drug-alcohol-test  Can I pay at the laboratory when I go for the test?

    Unfortunately, this facility is not available. You can pay online using a credit or debit card.


    time-drug-alcohol-detection  For how long after taking them can drugs be detected in your body?

    You can find a table of different drugs and their detection times in urine samples on this page.


    cdt-test  Is the CDT test the same as the one done by the DVLA?

    Yes. You can do this test on a walk-in basis in our Central London facility, or collect at home and post to us if it is more convenient.




      Collection list

      Alcohol Tests
      Alcohol Tests

      Alcohol Tests

      Drug Tests
      Drug Test

      Drug Tests

      Postal Tests
      home drug test kit

      Postal Tests

      Chain of Custody Drug Tests
      chain of custody drug test

      Chain of Custody Drug Tests

      Patient Reception

      76 Wimpole Street, London.

      W1G 9RT.

      Monday-Friday: 7AM - 7PM

      Saturday: 7AM - 1PM

      Sunday: Closed