Please note that links to the old Parliamentary intranet have been removed as of October 2023. Please use search on ParliNet to find relevant current details, if available.
https://parlinet.parliament.uk/house-of-commons-members-staff/
The Information Compliance Team has updated its guidance on Subject Access Requests for MPs’ offices and you can find it here
You could also have a look at our page on Data Protection here: https://w4mp.org/w4mp/w4mp-guides/your-office/data-protection/