Yes — HMR (Hammersmith Medicines Research), which recruits under the London Trials name, is a legitimate and well-established early-phase clinical trials unit in North West London. HMR is known for early-stage drug development, speed and safety, and operates under MHRA regulation and independent ethics approval. This review explains how HMR’s paid studies work, what they pay, and how to confirm any trial is genuine before you apply.
Who is HMR (London Trials)?
HMR — Hammersmith Medicines Research — is a clinical research unit in North West London that runs early-phase paid studies for healthy volunteers. It recruits volunteers under the London Trials name and is one of the longer-established early-phase units in the UK, focused on early-stage drug development with an emphasis on speed and safety.
Is HMR / London Trials legit, or a scam?
HMR is a genuine, regulated unit — not a scam. Its trials operate under the oversight that applies to all UK clinical research: every study must be authorised by the Medicines and Healthcare products Regulatory Agency (MHRA) and approved by an independent research ethics committee before any volunteer is enrolled.
The honest picture, as with any paid-research provider, sits in the detail:
- Positive: established early-phase unit focused on speed, safety and efficient study delivery.
- Mixed: early-phase studies usually involve residential stays in North West London, which won’t suit everyone.
- What to watch: screening is thorough, and not every applicant will be eligible for a given study.
How much do HMR / London Trials studies pay?
Pay depends on the individual study, its length, and the number of overnight stays. HMR’s early-phase residential studies typically sit at the higher end of the UK market because they often involve multi-day stays, ranging from a few hundred pounds up to £3,000 or more for longer trials. Our guide to the best-paid clinical trials in the UK shows how London compares with other locations.
HMR vs other UK trial providers
| Feature | HMR (London Trials) | Parexel | Quotient Sciences |
|---|---|---|---|
| Type | Early-phase unit | Global CRO | Runs own clinical unit |
| UK location | North West London | Uxbridge, Greater London | Nottingham |
| Known for | Speed, safety, early-stage work | Global standards, patient care | Strong onboarding |
| Typical pay | £100–£3,000+ | £100–£3,000+ | £100–£3,000+ |
If you’re comparing London options, our Parexel review covers the Uxbridge unit, and our Fortrea review covers Leeds for comparison.
How do I verify an HMR trial is genuine?
- Apply through HMR or London Trials’ official channels. Avoid third-party adverts you can’t trace back to the unit.
- Check the study is registered. Use the UK’s Be Part of Research service or the WHO registry.
- Confirm MHRA and ethics approval. Every UK medicine trial must be authorised by the MHRA and an ethics committee, as the NHS explains.
- Never pay to take part. A genuine study pays you; it never charges a fee.
Are HMR trials safe?
HMR’s studies operate under the same safeguards as all UK clinical research: independent ethics approval, MHRA authorisation, and on-site medical supervision following Good Clinical Practice. You can withdraw at any time, without giving a reason. Early-phase trials carry inherent risk because they test new compounds, which is why they are closely monitored and well paid. Our guide to clinical trial safety and compensation sets out the protections in more depth.
The verdict
HMR (London Trials) is a legitimate, well-established early-phase clinical research unit in North West London, focused on speed and safety. Apply through official channels, confirm the study is registered and MHRA-approved, never pay to join, and read the participant information sheet before you consent.
Frequently Asked Questions
Is HMR / London Trials legit?
Yes. HMR (Hammersmith Medicines Research), which recruits as London Trials, is an established, regulated early-phase clinical trials unit in North West London.
What is the difference between HMR and London Trials?
They are the same operation. HMR is the clinical research unit, and London Trials is the name it uses to recruit healthy volunteers.
Where is HMR based?
HMR runs its paid early-phase studies from a clinical unit in North West London.
How much do HMR trials pay?
Pay varies by study. Longer residential trials can pay £3,000 or more, while shorter studies pay less.
Are HMR trials safe?
Yes. They operate under MHRA authorisation, independent ethics approval and on-site medical supervision. You can withdraw at any time.
How do I find paid clinical trials in London?
You can apply directly through HMR or London Trials, or compare paid trials across London and the rest of the UK using CheckMyTrial.
Compare paid London trials
CheckMyTrial helps you compare paid clinical trials across the UK by location, pay and study type. Browse current paid trials or read how clinical trials work before you apply.