The GUYS@Mary’s clinic is a free, confidential sexual health service for men who have sex with men, which provides sexual health testing and treatment for men who are experiencing symptoms and advice on PEP and PrEP.


The GUYS@Mary’s clinic offers the following services:

  • Rapid HIV testing with results within five minutes
  • Testing and treatment of sexually transmitted infections
  • Post-exposure prophylaxis for HIV (PEP)
  • Pre-exposure prophylaxis (PrEP) support and advice
  • Hepatitis A and B vaccinations 
  • Human papillomavirus (HPV) vaccinations
  • Safe sex advice 
  • Chemsex advice and support 
  • Free condoms

Appointments for PEP or PrEP advice, symptoms and treatment

If you wish to discuss PEP or PrEP, are experiencing symptoms, or need treatment, please book an appointment using our online service below:

GUYS@Mary's appointments for PEP or PrEP advice, symptoms and treatment


Men who are not experiencing symptoms and don’t need PEP or PrEP advice

Men who are not experiencing symptoms and don’t need PEP or PrEP advice can get an online sexual health check-up with Sexual Health London. If you need a sexual health check-up and vaccinations, please book an appointment here.

NHS PrEP trial 

The Jefferiss Wing is taking part in the IMPACT PrEP trial. We have now filled our spaces for men who have sex with men.  For information about other recruiting clinics, please see the IMPACT trial website. If you would like to discuss other ways to access PrEP, please book an appointment at our Guys@Marys clinic.  We still have limited places for other people who are at higher risk of HIV.  If you would like to find out about joining the trial, please walk in to speak to one of the team.


GUYS@Mary's clinic
First floor
Jefferiss Wing
Praed Street
St Mary's Hospital
London W2 1NY


This clinic is run on Wednesdays from 17.00 to 19.10.


020 3312 6626

What to expect at your appointment

When you arrive please go to the clinic reception on the first floor of the Jefferiss Wing. If you are a new patient you will be asked to complete a short registration form.

You will receive some results during your visit and any others will be sent via a text message within a week.


Entry to the clinic is by self-referral through the online booking service above.


General Enquiries
020 3312 6626