Question to the Department of Health and Social Care:

To ask His Majesty's Government what are the diagnosis codes that will be used in the Office for National Statistics' assessment announced in the press release issued by NHS England on 5 December 2024 entitled "World leading NHS trial to boost health and support people in work”; and whether that analysis linking health and tax records will respect the National Data Opt Out.

The research plan is not complete yet, but it will consider what data should be used, including diagnosis codes, and how people's choices to opt-out will be respected.