Health monitoring
[ch 9: page 70]Part 4 of the ICO Code covers the obligations on employers collecting information on workers’ health, and good practice in doing so, including the need for a privacy impact assessment to ensure that the benefits gained from processing information about workers’ health justify the privacy intrusion or any other adverse impact on them.
ICO, The Employment Practices Code (https://ico.org.uk/media/for-organisations/documents/1064/the_employment_practices_code.pdf)