Opt-out testing flips the script. HIV tests become routine, not requested. This changes everything. Our pioneering three-year pilot in the South London boroughs of Lambeth, Southwark and Lewisham, funded by the Elton John AIDS Foundation and partners, helped transform early diagnosis and care, while saving the NHS an estimated £90 million. As part of the UK Government’s commitment to ending new cases of HIV, opt-out testing is being rolled out to 89 emergency departments in England, backed by a