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Abstract copyright UK Data Service and data collection copyright owner.The Cancer Awareness Measure (CAM) was developed in 2007-8 to address the absence of a validated measure of general public awareness of cancer (Stubbings, S., Robb, K., Waller, J., Ramirez, A., Austoker, J., Macleod, U., Hion, S., and Wardle, J. (2009) 'Development of a measurement tool to assess public awareness of cancer', British Journal of Cancer, 101(2), S13-S17.).The survey includes measures of awareness of signs and symptoms of cancer, cancer risk factors, age-related risk, screening programmes and potential barriers to seeing the GP. Since then, Cancer Research UK (CRUK) has significantly revised and updated the survey, including a wider range of questions and collecting data online instead of face-to-face. The CAM was also previously known as the National Awareness and Early Diagnosis Initiative Cancer Awareness Measure (NAEDI-CAM).CAM data has been collected by CRUK approximately every two years from 2008 to 2019, moving to bi-annual in 2021. A COVID specific CAM was developed in 2020 and 2021 to measure the longitudinal impact of COVID-19 pandemic on cancer attitudes and behaviour and understand the contextual influences on cancer attitudes and behaviour during COVID-19.Further information about the CAM may be found on the Cancer Research UK Cancer Awareness Measures (CAMs) webpage.Main Topics: This CAM questionnaire addressed the following topics:  public awareness of cancer symptoms public knowledge of cancer risk factorsbarriers and enablers to help seekinguptake of screening programmesbarriers to cancer screening - cervical, breast and bowelexperience of breast and cervical cancer screeningsymptom experienceimpact of COVID-19 on help seeking behaviourco-morbidities perception of symptom seriousnessperceptions of safety from COVID-19 in different medical settingshelp seeking behaviours including remote consultation and re-presentationperceptions of...