56 Dean Street, in central London, has recorded an 80% fall in diagnoses compared with 2015, while continuing to test the same number of people.

The figures have fallen from 72 a month in two years ago, to 11 in September 2017.

Doctors now believe a month with zero HIV diagnoses is possible after adopting San Francisco’s ‘Getting To Zero’ campaign.

Health bosses credit access to PrEP, a daily HIV-prevention pill, with the fall, and say the trend “will be further strengthened with the implementation of the PrEP Impact Trial over the next three years.”