Cervical Screening London (CSL) is a service provided for the NHS through a partnership between Health Services Laboratories (HSL) and London North West University Healthcare Trust (LNWUH)

For all enquiries, please call 020 7460 4851 or email hpv.supplies@hslpathology.com
Cervical Screening London (CSL) will provide a comprehensive, single-site HPV primary screening service for the NHS Cervical Screening Programme in London.
Based in HSL’s flagship laboratory, the Halo, CSL will draw on HSL’s specialist pathology expertise and LNWUH’s outstanding training and development opportunities to deliver a world-class cervical screening service.

HSL is a clinically-led provider of pathology and diagnostic services to the NHS. A partnership between The Doctors Laboratory, Royal Free London NHS Foundation Trust and University College London Hospitals NHS Foundation Trust, HSL’s purpose is to deliver medically-led diagnostics, innovation, value and long-term investment to the health economy.

LNWUH is home to the London Regional Cytology Training Centre, a fully accredited educational hub which provides high quality, whole pathway cancer screening training for healthcare professionals in London and the South East. 

About HPV primary screening

Human papillomavirus (HPV) primary screening is a new way of examining cervical screening samples, in which HPV testing replaces cytology (examining cells under a microscope) as the first step in the screening process.

High risk sub-types of HPV (hrHPV) cause 99% of all cervical cancers. The transition from cytology to HPV primary screening will help to identify more women at risk of developing cervical cancer and prevent around 600 additional cancers each year. 

HPV primary screening will be rolled out across the NHS Cervical Screening Programme in England by the end of December 2019. 

Information for sample takers 

The rollout of HPV primary screening across England coincided with the centralisation of cervical screening laboratory services.

 As of 2 December 2019, all NHS cervical screening samples in London are being transported to CSL’s central London laboratory, the Halo, for testing. HPV testing services will soon be co-located with cervical cytology to provide a single seamless service. Local colposcopy services will not change.

Cervical samples continue to be taken in the same way as before. There are new protocols for the follow-up and management of women according to the outcome of their HPV test:

Regular CSL information updates are available to download below

Update 10 – April 2021
  • In the year’s first issue, this update contains important information about some recurring issues we hope you can help us address: Please read it here
Update 9 – November 2020
  • The UK might be in lockdown, but it’s business as usual for Cervical Screening: read all about it here
  • Key contact details for CSL and related organisations (updated November 2020) – key contacts
Update 8 – September 2020
Update 7 – July 2020
  • Progress update on the recovery of cervical screening – read about our progress here
  • London Principles of Managing Infection Prevention and Control in General Practice whilst caring for all patients during the COVID-19 Pandemic – click here
Update 6 – June 2020
Update 5 – April 2020
      Update 4 – January 2020
      Update 3 – November 2019
Update 2 – October 2019


If you have any questions, please get in touch on csl@hslpathology.com

HSL is a partnership between The Doctors Laboratory, Royal Free London NHS Foundation Trust (the Royal Free London) and University College London Hospitals NHS Foundation Trust (UCLH)

Health Services Laboratories
Health Services Laboratories
Health Services Laboratories