Prime minister Gordon Brown has recorded a video message for World AIDS Day.
The annual day is held every December 1st.
In the message, Brown paid tribute to the gay community in the 1980s, which he said had “led the way” on HIV and AIDS campaigning.
He continued: “Even though there was so much sorrow, those who had lost loved ones did not accept the silence and the stigma and set up pioneering charities which are still changing and saving lives today.”
He also thanked international campaigners but said that in the UK, a quarter of those living with HIV are not aware they have the virus.
Brown said: “This government is wholly committed to HIV testing and tackling the stigma that persists.”
Deborah Jack, chief executive of NAT, said: “We are delighted that Gordon Brown has provided a message for our World AIDS Day website.
“We are especially pleased he has spoken about HIV in the UK in particular the need to increase HIV testing as well as fighting prejudice. He is right to say there is no room for complacency in tackling HIV.
“We hope the concern and commitment the prime minister has expressed today will be remembered beyond World AIDS Day.”
To watch the video, scroll down.