Organisers have said it is an opportunity to learn about the impact it had on communities.

The procession features speeches, candles and prayers.

Louise and Rebecca are both living with HIV and have been sharing their experiences.

On World Aids Day, Unicef's new head of HIV/Aids Anurita Bains tells the BBC that progress on HIV is stagnating for young people.

Dr Rupert Whitaker lived through the Aids epidemic in London in the 1980s.