add ukhsa

docs/index.md

@@ -63,6 +63,7 @@ Here is a list of some of our known users and their use cases:
 	- [Ministry of Justice](https://www.gov.uk/government/organisations/ministry-of-justice) created [linked datasets (combining courts, prisons and probation data)](https://www.adruk.org/our-work/browse-all-projects/data-first-harnessing-the-potential-of-linked-administrative-data-for-the-justice-system-169/) for use by researchers as part of the [Data First programme](https://www.gov.uk/guidance/ministry-of-justice-data-first)
 	- [Office for National Statistics](https://www.ons.gov.uk/)'s [Business Index](https://unece.org/sites/default/files/2023-04/ML2023_S1_UK_Breton_A.pdf) (formerly the Inter Departmental Business Register), [Demographic Index](https://uksa.statisticsauthority.gov.uk/wp-content/uploads/2023/02/EAP182-Quality-work-for-Demographic-Index-MDQA.pdf) and the [2021 Census](https://github.com/Data-Linkage/Splink-census-linkage/blob/main/SplinkCaseStudy.pdf).  See also [this article](https://www.government-transformation.com/data/interview-modernizing-public-sector-insight-through-automated-linkage).
 	- [Ministry of Defence](https://www.gov.uk/government/organisations/ministry-of-defence) recently launched their [Veteran's Card system](https://www.gov.uk/government/news/hm-armed-forces-veteran-cards-will-officially-launch-in-the-new-year-following-a-successful-assessment-from-the-central-digital-and-data-office) which uses Splink to verify applicants against historic records. This project was shortlisted for the [Civil Service Awards](https://www.civilserviceawards.com/creative-solutions-award/)
+	- [UK Health Security Agency](https://www.gov.uk/government/organisations/uk-health-security-agency) [used Splink](https://www.gov.uk/government/publications/bloodborne-viruses-opt-out-testing-in-emergency-departments/appendix-for-emergency-department-bloodborne-virus-opt-out-testing-12-month-interim-report-2023#:~:text=Appendix%202D%3A%20public%20health%20evaluation%20data%20linkage%20methodology) to link HIV testing data to national health records to [evaluate the impact of emergency department opt-out bloodborne virus testing](https://www.gov.uk/government/publications/bloodborne-viruses-opt-out-testing-in-emergency-departments/public-health-evaluation-of-bbv-opt-out-testing-in-eds-in-england-24-month-interim-report).
 	- The Department for Education uses Splink to match records from certain data providers to existing learners and reduce the volume of clerical work required for corrections
 	- [Lewisham Council](https://lewisham.gov.uk/) (London) [identified and auto-enrolled over 500 additional eligible families](https://lewisham.gov.uk/articles/news/extra-funding-for-lewisham-schools-in-pilot-data-project) to receive Free School Meals
 	- [London Office of Technology and Innovation](https://loti.london/) created a dashboard to help [better measure and reduce rough sleeping](https://loti.london/projects/rough-sleeping-insights-project/) across London