Clinical trials
Observational trials in the United Kingdom
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
6,310 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 10 |
| 2001 | 19 |
| 2002 | 18 |
| 2003 | 16 |
| 2004 | 32 |
| 2005 | 47 |
| 2006 | 47 |
| 2007 | 72 |
| 2008 | 96 |
| 2009 | 113 |
| 2010 | 175 |
| 2011 | 165 |
| 2012 | 202 |
| 2013 | 233 |
| 2014 | 265 |
| 2015 | 296 |
| 2016 | 301 |
| 2017 | 378 |
| 2018 | 379 |
| 2019 | 473 |
| 2020 | 505 |
| 2021 | 531 |
| 2022 | 433 |
| 2023 | 479 |
| 2024 | 394 |
| 2025 | 336 |
| 2026 | 258 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Completed | 3,221 |
| Unknown status | 1,239 |
| Recruiting | 919 |
| Active, not recruiting | 338 |
| Terminated | 194 |
| Not yet recruiting | 169 |
| Withdrawn | 105 |
| Enrolling by invitation | 92 |
| Suspended | 33 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Imperial College London | 295 |
| University College, London | 175 |
| University of Edinburgh | 162 |
| University of Nottingham | 149 |
| King's College London | 145 |
| University of Oxford | 141 |
| Royal Marsden NHS Foundation Trust | 123 |
| Guy's and St Thomas' NHS Foundation Trust | 109 |
| University of Leicester | 95 |
| Queen Mary University of London | 73 |
Top conditions
MeSH conditions the trials were registered with, not their broader categories. A condition with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| Neoplasms | 198 |
| COVID-19 | 163 |
| Heart Failure | 149 |
| Pulmonary Disease, Chronic Obstructive | 145 |
| Cardiovascular Diseases | 120 |
| Asthma | 119 |
| Stroke | 113 |
| Breast Neoplasms | 111 |
| Diabetes Mellitus | 97 |
| Atrial Fibrillation | 92 |
Trials
Showing 1 to 25 of 6,310. Each trial links to its page on Pharma Observatory.
6,210 more trials match. See them on Pharma Observatory
Recently changed trials
Changes observed in the last 7 days, newest first, site-count changes left out. Source: ClinicalTrials.gov.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.