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

Drug & Alcohol Testing Process

Confidential laboratory testing in Central London

Drug Testing in London

Compare urine, blood and chain-of-custody testing. Order online before attending Patient Reception.

✓ Central London collection ✓ UKAS-accredited laboratory ✓ Doctor-reviewed reports ✓ Secure email results
Choose the Right Test

Choose the correct drug test

Select according to sample type, coverage and reporting requirements.

Broad screening

Multi-Drug Tests

Screen several drug groups using one urine or blood sample.

Compare multi-drug tests → Targeted testing

Single-Drug Tests

Test for one known substance using targeted laboratory analysis.

Compare single-drug tests → Documented collection

Chain-of-Custody Tests

Choose documented identity, collection and sample handling.

View formal testing → Alcohol testing

Alcohol Tests

Compare CDT, PEth, urine and blood alcohol testing.

Compare alcohol tests → Home collection

Postal Tests

Collect privately and return your sample using prepaid packaging.

Compare postal tests →

Patient Reception attendance

Order online and await confirmation before attending.

Walk-in attendance times

Monday–Friday 7am–7pm
Saturday 7am–1pm
Sunday 8am–11am

Chain-of-custody collection

Available Monday–Friday, 9am–3pm. A confirmed appointment is required.

Important: Bring the original identification specified within your confirmation.

What is a drug test?

Drug testing analyses a biological sample for selected substances.

Testing may detect drugs, metabolites or related laboratory markers.

Available samples include urine and blood. Different samples provide different detection periods.

Why is drug testing requested?

Testing may support personal, workplace or formal requirements.

  • Personal reassurance or monitoring
  • Pre-employment and workplace testing
  • Legal or court-related requirements
  • Professional or organisational requirements
  • Documented chain-of-custody collection

Detection periods, prices and cut-offs

These factors vary between substances, samples and testing purposes.

Laboratory cut-offs

Screening uses defined thresholds for each tested substance.

Results below the relevant threshold are reported as negative.

The two-stage drug-testing process

1

Initial laboratory screening

The sample is screened for the requested drug groups. Negative screens require no confirmation testing.

2

Confirmation testing

Non-negative screens undergo more specific laboratory analysis. This may extend the reported turnaround.

Sample integrity

Urine creatinine may help identify an unusually dilute sample.

Dilution can affect whether the laboratory can report confidently.

Follow your attendance instructions before providing any sample.

Documented sample collection

Chain-of-custody testing records identity and sample handling.

Confirm the requesting organisation’s requirements before ordering.

View chain-of-custody testing →

Understanding your drug-test results

Results are reviewed before secure email delivery.

Screening result

This shows whether substances crossed their screening thresholds.

Confirmation result

This identifies confirmed substances after a non-negative screen.

Creatinine

This may indicate whether a urine sample is unusually dilute.

Clinical comments

Reviewed comments provide context for the reported laboratory findings.

Drug-testing questions

Do I need an appointment?

Most tests use walk-in attendance after confirmation. Chain-of-custody collection requires an appointment.

Should I order before attending?

Yes. Order online and await your attendance confirmation.

What identification should I bring?

Bring the original identification specified within your confirmation. Copies may not be accepted.

How quickly will results arrive?

Turnaround varies between tests and starts after usable sample receipt.

Can confirmation testing take longer?

Yes. Confirmation analysis may extend the final reporting time.

How will I receive my results?

Reviewed results are delivered securely by email. Telephone results are unavailable.

Collection list

Alcohol Tests
Alcohol Tests

Alcohol Tests

Drug Tests
Urine container

Drug Tests

Postal Tests
Home test kit package

Postal Tests

Chain of Custody Drug Tests
Urine specimen containers with client details and a chain of custody form

Chain of Custody Drug Tests

Patient Reception

76 Wimpole Street, London.

W1G 9RT.

Monday-Friday: 7AM - 7PM

Saturday: 7AM - 1PM

Sunday: Closed

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