Coronavirus update for sexual health services

We’re making changes to our sexual health and HIV services to help respond to coronavirus and protect our patients, staff and visitors. Learn more on our sexual health page.


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 live in a borough where the Sexual Health London service is not available, you can find your local service either through SH24 or (NHS Choices).

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 NHS PrEP IMPACT trial. We are now open for recruitment again for men who have sex with men, and have a limited number of places remaining for other patients at higher risk of HIV.

Please see the IMPACT trial website for more information, and if you would like to find out about joining the trial or to discuss other ways to access PrEP or be monitored while taking PReP, please walk in to speak to one of the team, or book an appointment in our Guys@Marys clinic.

For patients already enrolled on the trial: please check Guys@Marys to book an appointment online or call to book by phone. If you are running out of tablets and are unable to book an appointment on time, please attend the general walk in clinic, however please note there will be a wait to be seen.


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 1225

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 1225