Clinical trials
Trials in the United Kingdom with unknown status
Search ClinicalTrials.gov registrations by keyword, then narrow by condition, phase, status, country and start year.
3,166 trials match Source: ClinicalTrials.gov registrations
Trials started per year
By phase, 2000 to 2026.
| Category | Trials |
|---|---|
| 2000 | 13 |
| 2001 | 20 |
| 2002 | 20 |
| 2003 | 16 |
| 2004 | 29 |
| 2005 | 46 |
| 2006 | 49 |
| 2007 | 49 |
| 2008 | 65 |
| 2009 | 70 |
| 2010 | 80 |
| 2011 | 87 |
| 2012 | 100 |
| 2013 | 126 |
| 2014 | 136 |
| 2015 | 158 |
| 2016 | 166 |
| 2017 | 194 |
| 2018 | 209 |
| 2019 | 289 |
| 2020 | 264 |
| 2021 | 284 |
| 2022 | 237 |
| 2023 | 269 |
| 2024 | 115 |
| 2025 | 1 |
Status
Trials by registry status. Select a bar to filter.
| Category | Trials |
|---|---|
| Unknown status | 3,166 |
Top lead sponsors
A sponsor with a page on Pharma Observatory links to it.
| Category | Trials |
|---|---|
| University College, London | 163 |
| Imperial College London | 131 |
| King's College London | 121 |
| Royal Marsden NHS Foundation Trust | 110 |
| University of Oxford | 99 |
| Guy's and St Thomas' NHS Foundation Trust | 85 |
| NHS Greater Glasgow and Clyde | 85 |
| University of Nottingham | 83 |
| King's College Hospital NHS Trust | 51 |
| Cambridge University Hospitals NHS Foundation Trust | 47 |
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 |
|---|---|
| Breast Neoplasms | 107 |
| Neoplasms | 96 |
| Heart Failure | 67 |
| Stroke | 64 |
| Obesity | 63 |
| COVID-19 | 62 |
| Colorectal Neoplasms | 61 |
| Pulmonary Disease, Chronic Obstructive | 57 |
| Prostatic Neoplasms | 56 |
| Cardiovascular Diseases | 50 |
Trials
Showing 1 to 25 of 3,166. Each trial links to its page on Pharma Observatory.
3,066 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.
No changes to these trials in the last 7 days.
Go deeper on Pharma Observatory
Pharma Observatory connects clinical trials, sponsors, sites and investigators in one searchable platform.