London is the UK's largest hub for clinical research, home to world-leading teaching hospitals including Great Ormond Street, Guy's and St Thomas', Royal Marsden, and University College Hospital. The capital hosts more clinical trials than any other UK city, spanning oncology, cardiology, neurology, and rare diseases.
Free to use — Live data from ClinicalTrials.gov — Updated hourly
Browse actively recruiting clinical trials at sites in and around London
Major clinical research facilities running trials in the London area
One of the world's largest clinical research organisations, with a dedicated Phase 1 unit in London. Healthy volunteer and patient studies across therapeutic areas.
Independent clinical research unit at St George's Hospital. Specialises in early-phase trials and bioequivalence studies with healthy volunteers.
Major CRO with London operations. Runs multi-centre trials across therapeutic areas including oncology, CNS, and cardio-metabolic.
Well-established Phase 1 unit in Northwick Park. Focuses on first-in-human and early development studies.
Find clinical trials in other major UK research centres
Use TrialConnect to search for actively recruiting clinical trials in London. Our results come directly from ClinicalTrials.gov and include contact details for each trial site so you can reach out directly.
Parexel International and Richmond Pharmacology and Hammersmith Medicines Research run paid healthy volunteer studies. Compensation typically ranges from £500 to £3,000 per study. Check our paid research section for current opportunities.
Clinical trials in London cover a wide range of conditions including oncology, cardiology, neurology, respiratory medicine, rare diseases, and many more. Use our search to filter by specific condition or browse by condition.
Not always. Many trials accept self-referrals, though some require a referral from your GP or specialist. Contact the trial site directly using the details shown on each trial listing to confirm their process.
Yes. You never pay to participate in a clinical trial. All medical care related to the trial is provided free of charge. Some trials also compensate you for your time and travel expenses.