National chlamydia screening programme (NCSP): annual data
Source: gov.uk (2025-06-03)

Information on chlamydia testing and diagnoses in people aged 15 to 24 years in England by demographic characteristics and geographical region.

Download NCSP slide set 2024 (https://khub.net/documents/135939561/1051496671/NCSP+slide+set+2015+to+2024.odp/51bf65d0-6b2c-6488-73b3-1411a89f641f) for presentational use.

Download STI and NCSP infographic 2024 (https://khub.net/documents/135939561/1051496671/Sexually+transmitted+infections+in+England+2024.pdf/389966d2-91b0-6bde-86d5-c8f218c443e5) for presentational use.

The UK Health Security Agency (UKHSA) collects data on all local authority commissioned chlamydia tests undertaken in England, to measure screening activity.

The data provides information on the:
- trends in testing coverage
- proportion of tests that are positive
- detection rate
Figures by various demographic characteristics and by geographical distribution are also included.

View the pre-release access lists (https://www.gov.uk/government/publications/pre-release-access-lists-annual-stis-and-ncsp-statistical-releases) for these statistics.

Previous reports, data tables, slide sets, infographics, and pre-release access lists are available online:
- data to end of December 2023 (https://webarchive.nationalarchives.gov.uk/ukgwa/20250521191727/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2022 (https://webarchive.nationalarchives.gov.uk/ukgwa/20240503172355/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2021 (https://webarchive.nationalarchives.gov.uk/ukgwa/20230503112549/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2020 (https://webarchive.nationalarchives.gov.uk/ukgwa/20220929171715/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2019 (https://webarchive.nationalarchives.gov.uk/ukgwa/20210901011137/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2018 (https://webarchive.nationalarchives.gov.uk/ukgwa/20200828013846/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2017 (https://webarchive.nationalarchives.gov.uk/ukgwa/20190508225035/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2016 (https://webarchive.nationalarchives.gov.uk/ukgwa/20180511042545/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
- data to end of December 2015 (https://webarchive.nationalarchives.gov.uk/ukgwa/20170517173653/https:/www.gov.uk/government/statistics/national-chlamydia-screening-programme-ncsp-data-tables)
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