The Foundation For a Better Life's Pass It On public service campaign is honouring the work being done by the Elton John AIDS Foundation.
The ads have a photo of Elton and the words, ''a knight fighting for those with AIDS. Compassion. Pass it on.''
They will be up for two weeks, starting today, and are displayed across JCDecaux advertising sites including roadside, retail and rail locations.
Launching concurrently in both the UK and USA, the campaign encourages the public to 'Share a message of compassion' across social media, using the hashtags #Compassion and #PassitOn.