The Community Campaign is encouraging talented creatives to enter a competition for the chance to launch a campaign that aims to reduce rates of HIV and increase education about sexual health.
Submission for entries will run from now until 25 June and the winner will be announced in August.
The winning print campaign and online film campaign will run from September to December.
Print entries will be expected to educate and encourage every sexually active man to get tested for HIV at least once a year. The winner will be given the option to be creative director on the project, working with a professional agency to bring their campaign to life.
Entries for the online video campaign will talk about love, life, work, sex and relationships.
Entries will be put on display in selected gay bars across London and an expert panel will shorlist the entries before a public vote on Facebook.
The winning video will run extensively through online media and be shown in London’s most popular gay bars.
Stephen Fry said: "With one in seven gay men on the London scene now living with HIV, it’s never been more important to develop new ways to reach and engage people with a safe sex message."
Dr Alan McOwan, service director at 56 Dean Street, said, "We want to create a voice for the community to actively design, vote on and react to their own advertising. If we can all get involved – together, we can make a difference."